Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion
First Claim
1. An apparatus comprising:
- a virtually imaged phased array (VIPA) generator receiving an input light at a respective wavelength and producing a corresponding collimated output light traveling from the VIPA generator in a direction determined by the wavelength of the input light; and
a reflecting surface reflecting the output light back to the VIPA generator, the reflecting surface having different curvatures at different positions along a direction perpendicular to a plane which includes the traveling directions of collimated output light from the VIPA generator for input light at different wavelengths.
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Accused Products
Abstract
An optical apparatus for producing chromatic dispersion. The apparatus includes a virtually imaged phased array (VIPA) generator, a mirror and a lens. The VIPA generator receives an input light at a respective wavelength and produces a corresponding collimated output light traveling from the VIPA generator in a direction determined by the wavelength of the input light, the output light thereby being spatially distinguishable from an output light produced for an input light at a different wavelength. The mirror has a cone shape, or a modified cone shape. The lens focuses the output light traveling from the VIPA generator onto the mirror so that the mirror reflects the output light. The reflected light is directed by the lens back to the VIPA generator. In this manner, the apparatus provides chromatic dispersion to the input light. The modified cone shape of the mirror can be designed so that the apparatus provides a uniform chromatic dispersion to light in the same channel of a wavelength division multiplexed light. The mirror can be moved in a direction perpendicular to an angular dispersion direction of the VIPA generator, to change the amount of chromatic dispersion provided to the input light.
1 Citation
110 Claims
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1. An apparatus comprising:
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a virtually imaged phased array (VIPA) generator receiving an input light at a respective wavelength and producing a corresponding collimated output light traveling from the VIPA generator in a direction determined by the wavelength of the input light; and
a reflecting surface reflecting the output light back to the VIPA generator, the reflecting surface having different curvatures at different positions along a direction perpendicular to a plane which includes the traveling directions of collimated output light from the VIPA generator for input light at different wavelengths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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17. An apparatus comprising:
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a virtually imaged phased array (VIPA) generator receiving an input light at a respective wavelength and producing a corresponding collimated output light traveling from the VIPA generator in a direction determined by the wavelength of the input light, the output light thereby being spatially distinguishable from an output light produced for an input light at a different wavelength;
reflecting surface having a cone or modified cone shape; and
a lens or mirror focusing the output light traveling from the VIPA generator onto the reflecting surface so that the reflecting surface reflects the output light, the reflected light being directed by the said lens or mirror back to the VIPA generator.
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32. An apparatus comprising:
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an angular dispersive component having a passage area to receive light into, and to output light from, the angular dispersive component, the angular dispersive component receiving, through the passage area, an input light having a respective wavelength within a continuous range of wavelengths, and causing multiple reflection of the input light to produce self-interference that forms a collimated output light which travels from the angular dispersive component along a direction determined by the wavelength of the input light and is thereby spatially distinguishable from an output light formed for an input light having any other wavelength within the continuous range of wavelengths; and
a reflecting surface reflecting the output light back to the angular dispersive component to undergo multiple reflection in the angular dispersive component and then be output from the passage area, the reflecting surface having different curvatures at different positions along a direction which is perpendicular to a plane which includes the travel direction of collimated output light from the angular dispersive component for input light at different wavelengths. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 46, 47, 48, 49, 50, 51, 53, 54, 55, 56, 57, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69)
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45. An apparatus comprising:
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an angular dispersive component having a passage area to receive light into, and to output light from, the angular dispersive component, the angular dispersive component receiving, through the passage area, a line focused input light and causing multiple reflection of the input light to produce self-interference that forms a collimated output light which travels from the angular dispersive component along a direction determined by the wavelength of the input light and is thereby spatially distinguishable from an output light formed for an input light having a different wavelength; and
a reflecting surface reflecting the output light back to the angular dispersive component to undergo multiple reflection in the angular dispersive component and then be output from the passage area, the reflecting surface having different curvatures at different positions along a direction which is perpendicular to a plane which includes the travel direction of collimated output light from the angular dispersive component for input light at different wavelengths.
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52. An apparatus as in claim S1, wherein the second angular dispersive component is a transmission type diffraction grating, a reflection type diffraction grating or a holographic grating.
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58. An apparatus comprising:
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first and second reflecting surfaces, the second reflecting surface having a reflectivity which causes a portion of light incident thereon to be transmitted therethrough, where an input light at a respective wavelength is focused into a line, and the first and second reflecting surfaces are positioned so that the input light radiates from the line to be reflected a plurality of times between the first and second reflecting surfaces and thereby cause a plurality of lights to be transmitted through the second reflecting surface, the plurality of transmitted lights interfering with each other to produce a collimated output light which travels from the second reflecting surface along a direction determined by the wavelength of the input light, and is thereby specially distinguishable from an output light formed for an input light having a different wavelength; and
a mirror surface reflecting output the light back to the second reflecting surface to pass through the second reflecting surface and undergo multiple reflection between the first and second reflecting surfaces, the mirror surface having different curvatures at different positions along a direction which is perpendicular to a plane which includes the travel direction of collimated output light from the second reflecting surface for input light at different wavelengths.
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70. An apparatus comprising:
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first and second reflecting surfaces, the second reflecting surface having a reflectivity which causes a portion of light incident thereon to be transmitted therethrough;
means for causing an input light at a respective wavelength and focused into a line to radiate from the line to be reflected a plurality of times between the first and second reflecting surfaces and thereby cause a plurality of lights to be transmitted through the second reflecting surface, the plurality of transmitted lights interfering with each other to produce a collimated output light traveling from the second reflecting surface in a direction determined by the wavelength of the input light, and is thereby spatially distinguishable from an output light produced for an input light at a different wavelength;
a mirror surface having a cone or modified cone shape; and
a lens or mirror focusing the output light traveling from the second reflecting surface onto the mirror surface so that the mirror surface reflects the output light, the reflected light being directed by said lens or mirror back to the second reflecting surface.
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71. An apparatus comprising:
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a virtually imaged phased array (VIPA) generator receiving a line focused wavelength division multiplexed light including light at first and second wavelengths, and producing collimated first and second output lights corresponding, respectively, to the first and second wavelengths, the first and second output lights traveling from the VIPA generator in first and second directions, respectively, determined by the first and second wavelengths, respectively;
a lens or light directing mirror focusing the first and second output lights traveling from the VIPA generator;
first and second mirrors each having a cone shape or a modified cone shape for producing a uniform chromatic dispersion; and
a wavelength filter filtering light focused by said lens or light directing mirror so that light at the first wavelength is focused to the first mirror and reflected by the first mirror, and light at the second wavelength is focused to the second mirror and reflected by the second mirror, the reflected first and second lights being directed by the wavelength filter and said lens or light directing mirror back to the VIPA generator. - View Dependent Claims (72)
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73. An apparatus comprising:
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first and second reflecting surfaces, the second reflecting surface having a reflectivity which causes a portion of light incident thereon to be transmitted therethrough, where a wavelength division multiplexed (WDM) light including light at first and second wavelengths is focused into a line, and the first and second reflecting surfaces are positioned so that the WDM light radiates from the line to be reflected a plurality of times between the first and second reflecting surfaces and thereby cause a plurality of lights to be transmitted through the second reflecting surface, the plurality of transmitted lights interfering with each other to produce collimated first and second output lights corresponding, respectively, to the first and second wavelengths, the first and second output lights traveling from the second reflecting surface in first and second directions, respectively, determined by the first and second wavelengths, respectively;
a lens or light directing mirror focusing the first and second output lights traveling from the second reflecting surface;
first and second mirrors each having a cone shape or a modified cone shape for producing a uniform chromatic dispersion; and
a wavelength filter filtering light focused by said lens or light directing mirror so that light at the first wavelength is focused to the first mirror and reflected by the first mirror, and light at the second wavelength is focused to the second mirror and reflected by the second mirror, the reflected first and second lights being directed by the wavelength filter and said lens or light directing mirror back to the second reflecting surface to pass through the second reflecting surface and undergo multiple reflection between the first and second surfaces. - View Dependent Claims (74)
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75. A communication system comprising:
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an optical transmission line;
a transmitter transmitting an optical signal through the transmission line;
a receiver receiving optical signal from the transmission line; and
a compensation device operatively connected in one of the group consisting of the transmitter, the receiver and the transmission line, to provide dispersion slope or higher order dispersion to the optical signal, the compensation device comprising a virtually imaged phased array (VIPA) generator receiving the optical signal as a line focused input light and producing a corresponding collimated output light traveling from the VIPA generator in a direction determined by a wavelength of the input light, a mirror having a cone or modified cone shape, and a light directing device focusing the output light traveling from the VIPA generator onto the mirror so that the mirror reflects the output light, the reflected light being directed by the light directing device back to the VIPA generator.
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76. A communication system comprising:
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an optical transmission line;
a transmitter transmitting an optical signal through the transmission line;
a receiver receiving optical signal from the transmission line; and
a compensation device operatively connected in one of the group consisting of the transmitter, the receiver and the transmission line, to provide dispersion slope or higher order dispersion to the optical signal, the compensation device comprising first and second reflecting surfaces, the second reflecting surface having a reflectivity which causes a portion of light incident thereon to be transmitted therethrough, where the optical signal is focused into a line as a line focused input light to the compensation device, and the first and second reflecting surfaces are positioned so that the input light radiates from the line to be reflected a plurality of times between the first and second reflecting surfaces and thereby cause a plurality of lights to be transmitted through the second reflecting surface, the plurality of transmitted lights interfering with each other to produce a collimated output light which travels from the second reflecting surface along a direction determined by a wavelength of the input light, and is thereby specially distinguishable from an output light formed for an input light having a different wavelength, and a mirror reflecting output the light back to the second reflecting surface to pass through the second reflecting surface and undergo multiple reflection between the first and second reflecting surfaces, the mirror having different curvatures at different positions along a direction which is perpendicular to a plane which includes the travel direction of collimated output light from the second reflecting surface for input light at different wavelengths.
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77. An apparatus comprising:
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a virtually imaged phased array (VIPA) generator receiving an input light at a respective wavelength and having a double-hump shaped far field distribution, and producing a corresponding collimated output light traveling from the VIPA generator in a direction determined by the wavelength of the input light; and
a reflecting surface reflecting the output light back to the VIPA generator. - View Dependent Claims (78, 79, 80, 81, 82)
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83. An apparatus comprising:
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a virtually imaged phased array (VIPA) generator receiving an input light at a respective wavelength and having a double-hump shaped far field distribution, and producing a corresponding collimated output light traveling from the VIPA generator in a direction determined by the wavelength of the input light, the output light thereby being spatially distinguishable from an output light produced for an input light at a different wavelength;
a reflecting surface; and
a lens or mirror focusing the output light traveling from the VIPA generator onto the reflecting surface so that the reflecting surface reflects the output light, the reflected light being directed by said lens or mirror back to the VIPA generator. - View Dependent Claims (84, 85, 86, 87)
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88. An apparatus comprising:
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an angular dispersive component having a passage area to receive light into, and to output light from, the angular dispersive component, the angular dispersive component receiving, through the passage area, an input light having a respective wavelength within a continuous range of wavelengths and having a double-hump shaped far field distribution, and causing multiple reflection of the input light to produce self-interference that forms a collimated output light which travels from the angular dispersive component along a direction determined by the wavelength of the input light and is thereby spatially distinguishable from an output light formed for an input light having any other wavelength within the continuous range of wavelengths; and
a reflecting surface reflecting the output light back to the angular dispersive component to undergo multiple reflection in the angular dispersive component and then be output from the passage area. - View Dependent Claims (89, 90, 91, 92, 93)
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94. An apparatus comprising:
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an angular dispersive component having a passage area to receive light into, and to output light from, the angular dispersive component, the angular dispersive component receiving, through the passage area, a line focused input light having a double-hump shaped far field distribution and causing multiple reflection of the input light to produce self-interference that forms a collimated output light which travels from the angular dispersive component along a direction determined by the wavelength of the input light and is thereby spatially distinguishable from an output light formed for an input light having a different wavelength; and
a reflecting surface reflecting the output light back to the angular dispersive component to undergo multiple reflection in the angular dispersive component and then be output from the passage area. - View Dependent Claims (95, 96, 97, 98, 99)
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100. An apparatus comprising:
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first and second reflecting surfaces, the second reflecting surface having a reflectivity which causes a portion of light incident thereon to be transmitted therethrough, where an input light at a respective wavelength is focused into a line and has a double hump shaped far field distribution, and the first and second reflecting surfaces are positioned so that the input light radiates from the line to be reflected a plurality of times between the first and second reflecting surfaces and thereby cause a plurality of lights to be transmitted through the second reflecting surface, the plurality of transmitted lights interfering with each other to produce a collimated output light which travels from the second reflecting surface along a direction determined by the wavelength of the input light, and is thereby specially distinguishable from an output light formed for an input light having a different wavelength; and
a mirror surface reflecting output the light back to the second reflecting surface to pass through the second reflecting surface and undergo multiple reflection between the first and second reflecting surfaces. - View Dependent Claims (101, 102, 103, 104, 105)
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106. An apparatus comprising:
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a virtually imaged phased array (VIPA) generator receiving a line focused input light at a respective wavelength and producing a corresponding collimated output light traveling from the VIPA generator in a direction determined by the wavelength of the input light, the output light thereby being spatially distinguishable from an output light produced for an input light at a different wavelength, the input light having an associated loss curve; and
an excess loss component adding loss to the input light to flatten the loss curve. - View Dependent Claims (107)
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108. An apparatus comprising:
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a virtually imaged phased array (VIPA) generator receiving a line focused input light at a respective wavelength and producing a corresponding collimated output light traveling from the VIPA generator in a direction determined by the wavelength of the input light, the VIPA generator having a corresponding angular dispersion direction; and
a reflecting surface reflecting the output light back to the VIPA generator to provide chromatic dispersion or higher order dispersion to the input light, wherein reflectivity of the reflecting surface is modulated along the angular dispersion direction of the VIPA generator. - View Dependent Claims (109)
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110. An apparatus comprising:
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a virtually imaged phased array (VIPA) generator receiving a line focused input light at a respective wavelength and producing a corresponding collimated output light traveling from the VIPA generator in a direction determined by the wavelength of the input light, the VIPA generator having a corresponding angular dispersion direction and the input light having an associated loss curve;
a reflecting surface; and
a lens or mirror focusing the output light traveling from the VIPA generator onto the reflecting surface so that the reflecting surface reflects the output light, the reflected light being directed by the said lens or mirror back to the VIPA generator, wherein the reflecting surface is patterned to flatten the loss curve.
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Specification