Low cost, easy to build precision wavelength locker
AssigneeOplink Communications, Inc.
InventorsYu Zheng, David Li, Xiaobing Luo
Life of this patent
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Abstract
A system and method providing a wavelength locker is disclosed. The method and system provide a high uniformity, low polarization sensitivity optical coupler. The optical coupler further comprises a first outer fiber and a second outer fiber. The first outer fiber and the second outer fiber each have a first portion. The method and system further provide a filter coupled to the first portion of the first outer fiber. The method and system further provide a first mechanism coupled to the filter for detecting intensity and providing a first resultant. The method and system further provide a second mechanism coupled to the second portion of the second outer fiber. The second mechanism detects intensity and provides a second resultant.
Claims13
A method for providing a wavelength locker comprising the steps of:
- providing a high uniformity, low polarization sensitivity optical coupler for splitting an optical signal including at least one wavelength, the optical coupler further comprising a first outer fiber, a center fiber, and a second outer fiber, the first outer fiber and the second outer fiber each having a first portion, the first portion of the first outer fiber for carrying a first portion of the optical signal, the first portion of the second outer fiber for carrying a second portion of the optical signal;
- providing a filter coupled to the first portion of the first outer fiber;
- providing a first means coupled to the filter, the first means for detecting intensity and providing a first resultant;
- and
- providing a second means coupled to the first portion of the second outer fiber, the second means for detecting intensity and providing a second resultant
- wherein the optical signal is not split based on the at least one wavelength.
A system for providing a wavelength locker comprising:
- means for providing a high uniformity, low polarization sensitivity optical coupler for splitting an optical signal having at least one wavelength, the optical coupler having a first outer fiber, a center fiber, and a second outer fiber, the first outer fiber and the second outer fiber each having a first portion, the first portion of the first outer fiber for carrying a first portion of the optical signal, the first portion of the second outer fiber for carrying a second portion of the optical signal;
- means for providing a filter coupled to the first portion of the first outer fiber;
- means for providing a first means coupled to the filter, the first means for detecting intensity and providing a first resultant;
- and
- means for providing a second means coupled to the first portion of the second outer fiber, the second means for detecting intensity and providing a second resultant
- wherein the optical signal is not split based on the at least one wavelength.
A wavelength locker comprising:
- a high uniformity, low polarization sensitivity optical coupler for splitting an optical signal having at least one wavelength, the optical coupler having a center fiber, first outer fiber, and a second outer fiber, the first outer fiber and the second outer fiber each having a first portion, the central fiber for receiving an optical signal, the first portion of the first outer fiber for carrying a first portion of the optical signal, and the first portion of the second outer fiber for carrying a second portion of the optical signal;
- a filter optically coupled to the first portion of the first outer fiber;
- a first photodetector optically coupled to the filter, the first photodetector for detecting a first intensity of the first portion of the optical signal and providing a first resultant;
- and
- a second photodetector optically coupled to the first portion of the second outer fiber, the second photodetector for detecting an intensity of the second portion of the optical signal and providing a second resultant
- wherein the optical signal is not split based on the at least one wavelength.
Dependencies are inferred from the claim text.