COMPENSATOR FOR WAVELENGTH DRIFT DUE TO VARIABLE LASER INJECTION CURRENT AND TEMPERATURE IN A DIRECTLY MODULATED BURST MODE LASER
First Claim
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1. An optical node comprising:
- a tunable optical transceiver having a laser and a temperature element; and
a wavelength shift stabilization circuit configured to adjust current provided to the temperature element such that wavelength shifts, due to changes in a drive current applied to the tunable optical transceiver, are reduced.
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Abstract
An optical node comprises a tunable optical transceiver having a laser and a temperature element. The optical node also comprises a wavelength shift stabilization circuit configured to adjust current provided to the temperature element such that wavelength shifts, due to changes in a drive current applied to the tunable optical transceiver, are reduced.
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Citations
20 Claims
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1. An optical node comprising:
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a tunable optical transceiver having a laser and a temperature element; and a wavelength shift stabilization circuit configured to adjust current provided to the temperature element such that wavelength shifts, due to changes in a drive current applied to the tunable optical transceiver, are reduced. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An optical network comprising:
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an optical line terminal having one or more transmitters configured to transmit optical signals and one or more receivers configured to receive optical signals, wherein each of the one or more transmitters and each of the one or more receivers is configured to operate over a respective frequency within a frequency band; a plurality of optical network units coupled to the optical line terminal, wherein each of the plurality of optical network units comprises; an optical laser configured to transmit optical bursts to the optical line terminal; a temperature element coupled to the optical laser; and a wavelength shift stabilization circuit configured to adjust current provided to the temperature element to compensate for wavelength shifts due to changes in a drive current applied to the optical laser. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of stabilizing variation in laser wavelength of an optical network unit in an optical network, the method comprising:
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tuning a laser in the optical network unit to an upstream wavelength based on communication received from an optical line terminal communicatively coupled to the optical network unit; generating, with the optical network unit, optical bursts at the upstream wavelength by varying drive current to the laser, wherein varying the drive current changes a laser die temperature of the laser; and compensating for wavelength drift caused by the varying laser die temperature by adjusting current to a temperature element coupled to the laser. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification