Wavelength monitoring and/or control device, laser system comprising said device and method of operating said device
A technology for controlling equipment and equipment, applied in the field of wavelength monitoring and/or controlling equipment, laser systems including said equipment and operating said equipment, capable of solving the problems of non-existence of continuous tuning and the like
Active Publication Date: 2021-10-26
HUAWEI TECH CO LTD
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Problems solved by technology
[0011] In view of the above-mentioned problems and shortcomings, the object of the present invention is to provide a continuous frequency tuning of laser sources, especially for DWDM optical systems, without the above-mentioned shortcomings and shortcomings of the most advanced solutions that solve the continuous tuning problem
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Embodiment Construction
[0125] Figure 4 It schematically shows the wavelength monitoring and / or control device described in the first aspect of the present invention.
[0126] Figure 4 The illustrated wavelength monitoring and / or control device 401 includes a first beam splitter 403 and an etalon filter 404 . Outside the wavelength monitoring and / or control device 401, preferably a tunable laser 402 is used to emit a laser beam B0 (also called raw laser beam) with a certain frequency or wavelength.
[0127] Preferably, the first beam splitter 403 and the etalon filter 404 are arranged in the optical path of the wavelength monitoring and / or control device 401, so that the original laser beam B0 received from the laser 402 passes through the first beam splitter 403 and the etalon A filter 404, wherein the etalon filter 404 is arranged behind the first beam splitter 403 in the optical path.
[0128] The first beam splitter 403 is used to divide the original laser beam B0 into two beams B1 and B2 wi...
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The present invention provides a wavelength monitoring and / or controlling device, preferably a wavelength locker, for monitoring and / or controlling the wavelength or frequency of a raw laser beam received from a tunable laser. The apparatus includes a first beam splitter and an etalon filter. The first beam splitter is used for splitting the original laser beam into two beams with a predetermined angular displacement, and for differently polarizing the two beams so that a first beam of the two beams has a first polarization, a second beam of the two beams has a second polarization; the etalon filter is used to filter the two polarized beams with a predetermined angular displacement. The invention also provides a laser system comprising at least one said wavelength monitoring and / or control device according to the invention and a method of operating said wavelength monitoring and / or control device according to the invention.
Description
technical field [0001] The present invention relates to a wavelength monitoring and / or control device, preferably a wavelength locker, for monitoring and / or controlling the wavelength or frequency of a raw laser beam received from a tunable laser, a device comprising at least A laser system of said wavelength monitoring and / or control device and a method of operating said wavelength monitoring and / or control device according to the invention. Background technique [0002] In dense wavelength division multiplexing (DWDM) optical systems, a laser source is frequency-tuned into several channels, which are optically modulated and multiplexed into a single-mode fiber for long-distance communication links. figure 1 An example of a DWDM optical system is schematically shown, where a laser source is frequency tuned to several channels, which are optically modulated and multiplexed into a single-mode fiber. The wavelength locker (wavelength locker, WL) is used to ensure stable and a...
Claims
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IPC IPC(8): H04B10/572H01S5/0687
CPCH01S5/0687H04B10/572
Inventor 阿尔贝托·兰普拉保罗·扎戈
Owner HUAWEI TECH CO LTD