Optical connector
First Claim
Patent Images
1. An optical connector for constituting a part of a transmission line, comprising:
- an optical filter, as at least a part of said transmission line, having a waveguide structure comprising a core having a predetermined refractive index and a cladding which covers an outer periphery of said core and has a lower refractive index than said core, said optical filter having a tip portion, at least one end face, and a grating for reflecting light of a predetermined wavelength, said grating being provided at a predetermined position of said optical filter; and
a plug, attached to said optical filter, defining a space for accommodating at least said tip portion of said optical filter including one end face of said optical filter, wherein said tip portion of said filter containing said grating is accommodated in the space of said plug.
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Abstract
The optical connector according to the present invention comprises, at least, an optical filter with a waveguide structure having a grating with a predetermined reflection wavelength and a plug attached to a tip of the optical filter. The grating is disposed at a tip portion of the optical filter and accommodated in the plug attached to the tip portion of the optical filter. Further, the optical connector has various light-blocking structures for preventing unnecessary light from traveling a filter region of the optical filter including the grating.
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Citations
67 Claims
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1. An optical connector for constituting a part of a transmission line, comprising:
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an optical filter, as at least a part of said transmission line, having a waveguide structure comprising a core having a predetermined refractive index and a cladding which covers an outer periphery of said core and has a lower refractive index than said core, said optical filter having a tip portion, at least one end face, and a grating for reflecting light of a predetermined wavelength, said grating being provided at a predetermined position of said optical filter; and a plug, attached to said optical filter, defining a space for accommodating at least said tip portion of said optical filter including one end face of said optical filter, wherein said tip portion of said filter containing said grating is accommodated in the space of said plug. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. An optical connector comprising:
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an optical filter, as at least a part of a transmission line, having a waveguide structure comprised of a core having a predetermined refractive index and a cladding which covers an outer periphery of said core and has a lower refractive index than said core, said optical filter having a grating for reflecting light of a predetermined wavelength, said grating being provided at a predetermined position of said optical filter; and a plug which has a space for accommodating at least a tip portion of said optical filter including one end face of said optical filter, said plug including; a ferrule having a through-hole for accommodating a part of said tip portion of said optical filter and being attached to said optical filter, while accommodating said part of said tip portion in said through-hole thereof; and a flange to which one end of said ferrule is attached, said flange having a hollow portion for accommodating at least a remaining part of said tip portion of said optical filter which is not accommodated in said through-hole of said ferrule, and wherein said grating is located at a predetermined position of said remaining part of said tip portion which is accommodated in said hollow portion of said flange. - View Dependent Claims (35, 36, 37, 38, 39)
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40. An optical connector comprising:
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an optical filter, as at least a part of a transmission line, having a waveguide structure comprised of a core having a predetermined refractive index and a cladding which covers an outer periphery of said core and has a lower refractive index than said core, said optical filter having a grating for reflecting light of a predetermined wavelength, said grating being provided at a predetermined position of said optical filter; and a ferrule having a through-hole for accommodating a part of a tip portion of said optical filter including one end face of said optical filter and being attached to said optical filter, while accommodating said part of said tip portion in said through-hole thereof, said ferrule comprising a light-transmitting material which transmits therethrough light having a wavelength corresponding to the reflection wavelength of said grating. - View Dependent Claims (41, 42)
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43. An optical connector comprising:
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an optical filter, as at least a part of a transmission line, having a waveguide structure comprised of a core having a predetermined refractive index and a cladding which covers an outer periphery of said core and has a lower refractive index than said core, said optical filter having a grating for reflecting light of a predetermined wavelength, said grating being provided at a predetermined position of said optical filter; and a ferrule having a through-hole for accommodating a part of a tip portion of said optical filter including one end face of said optical filter and being attached to said optical filter, while accommodating said part of said tip portion in said through-hole thereof, said ferrule having a light-absorbing structure for absorbing light having a wavelength corresponding to the reflection wavelength of said grating, said light-absorbing structure being disposed in a region where, of light to be reflected by said grating, a light component radiated from said grating to said cladding reaches. - View Dependent Claims (44, 45, 46)
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47. An optical connector comprising:
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an optical filter, as at least a part of a transmission line, having a waveguide structure comprised of a core having a predetermined refractive index and a cladding which covers an outer periphery of said core and has a lower refractive index than said core, said optical filter having a grating for reflecting light of a predetermined wavelength, said grating being provided at a predetermined position of said optical filter; and a ferrule having a through-hole for accommodating a part of a tip portion of said optical filter including one end face of said optical filter and being attached to said optical filter, while accommodating said part of said tip portion in said through-hole thereof, wherein a predetermined portion of said tip portion of said optical filter which is accommodated in said through-hole of said ferrule and where, of light to be reflected by said grating, a light component radiated from said grating to said cladding reaches has an outer diameter smaller than the outer diameter of a remaining portion of said optical filter, and wherein a space defined by an outer peripheral surface of said predetermined portion of said tip portion and an inner wall of said through-hole of said ferrule is filled with a light-absorbing material which absorbs light having a wavelength corresponding to the reflection wavelength of said grating. - View Dependent Claims (48, 49)
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50. An optical filter comprising:
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an optical filter, as at least a part of a transmission line, having a waveguide structure comprised of a core having a predetermined refractive index and a cladding which covers an outer periphery of said core and has a lower refractive index than said core, said optical filter having a grating for reflecting light of a predetermined wavelength, said grating being provided at a predetermined position of said optical filter; and a plug having a space for accommodating at least a part of a tip portion of said optical filter including one end face of said optical filter and being attached to said optical filter, while accommodating said part of said tip portion in said space, said plug having a structure for restricting a light-emitting opening in said one end face of said optical filter to a size smaller than the size of a cross section of said optical filter perpendicular to an optical axis of said optical filter. - View Dependent Claims (51, 52, 53, 54, 55)
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56. An optical connector comprising:
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an optical filter, as at least a part of a transmission line, having a waveguide structure comprised of a core having a predetermined refractive index and a cladding which covers an outer periphery of said core and has a lower refractive index than said core, said optical filter having a grating for reflecting light of a predetermined wavelength, said grating being provided at a predetermined position of said optical filter; and a ferrule having a through-hole for accommodating a part of a tip portion of said optical filter including one end face of said optical filter and being attached to said optical filter, while accommodating said part of said tip portion in said through-hole thereof, said ferrule having a structure for exposing a region of an outer peripheral surface of said tip portion of said optical filter accommodated in said through-hole of said ferrule where, of light to be reflected by said grating, a light component radiated from said grating to said cladding reaches. - View Dependent Claims (57, 58, 59)
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60. An optical connector comprising:
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an optical filter, as at least a part of a transmission line, having a waveguide structure comprised of a core having a predetermined refractive index and a cladding which covers an outer periphery of said core and has a lower refractive index than said core, said optical filter having a grating for reflecting light of a predetermined wavelength, said grating being provided at a predetermined position of said optical filter; and an accommodating member having a through-hole for accommodating a part of a tip portion of said optical filter including one end face of said optical filter and being attached to said optical filter, while accommodating said part of said tip portion in said through-hole, wherein said grating is accommodated in said through-hole of said accommodating member and is spaced from said one end face of said optical filter by at least 3 mm.
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61. An optical connector comprising:
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an optical filter, as at least a part of a transmission line, having a waveguide structure comprised of a core having a predetermined refractive index and a cladding which covers an outer periphery of said core and has a lower refractive index than said core, said optical filter having a grating for reflecting light of a predetermined wavelength, said grating being provided at a predetermined position of said optical filter; and a ferrule having a through-hole for accommodating a part of a tip portion of said optical filter including one end face of said optical filter and being attached to said optical filter, while accommodating said part of said tip portion in said through-hole, wherein a region of said through-hole of said ferrule where, of light to be reflected by said grating, a light component radiated from said grating to said cladding reaches has a cross-sectional area larger than the cross-sectional area of an opening of said ferrule positioned on said one end face side of said optical filter with respect to said grating.
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62. An optical connector comprising:
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an optical filter, as at least a part of a transmission line, having a waveguide structure comprised of a core having a predetermined refractive index and a cladding which covers an outer periphery of said core and has a lower refractive index than said core, said optical filter having a grating for reflecting light of a predetermined wavelength, said grating being provided at a predetermined position of said optical filter; and a ferrule having a through-hole for accommodating a part of a tip portion of said optical filter including one end face of said optical filter and being attached to said optical filter, while accommodating said part of said tip portion in said through-hole, wherein a groove is disposed in at least a region of an inner wall of said through-hole of said ferrule where, of light to be reflected by said grating, a light component radiated from said grating to said cladding reaches. - View Dependent Claims (63, 64, 65, 66, 67)
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Specification