Device and method for realizing dynamic locking of semiconductor laser wavelength
A wavelength locking and laser technology, applied in semiconductor laser devices, semiconductor lasers, laser devices, etc., to achieve the effects of avoiding complexity, good wavelength locking resolution, and high response performance
Active Publication Date: 2021-03-30
SOUTHEAST UNIV
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It is worth noting that in many application fields such as microwave photonics and fiber optic sensors, the more demand for lasers is not the "absolute" non-drift of each wavelength, but the "relative" stability and tunability of a group of wavelengths, that is, the mutual wavelength Differential locking, such as millimeter-wave technology based on dual-wavelength lasers, microwave photon signal filtering, dual-wavelength fiber optic temperature sensors and other applications, these are all unsatisfactory for existing external laser wavelength stabilization solutions
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[0024] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings.
[0025] Such as figure 1As shown, a semiconductor laser wavelength locking system with a high dynamic range disclosed in the present invention includes: a laser array module, a wavelength drift detection module, and a wavelength drift compensation module, which can simultaneously perform wavelength detection on k-1 lasers whose wavelengths are to be locked. Poor locking.
[0026] The laser array module includes a master laser, k-1 slave lasers and k couplers. The continuous light waves output by each laser are distributed by a coupler and then output according to the ratio of m:n. The continuous light waves generated by the k lasers are After power allocation, it is divided into k-channel branch output signals with a power ratio of m%, k-channel branch output signals with a power ratio of n%, and the k-channel branch output signals with a power rati...
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Abstract
The invention discloses a device and method for dynamically locking the wavelength of a semiconductor laser, belongs to the technical field of measurement and testing, and enlarges the dynamic compensation range of wavelength drift. The device comprises a laser array module, a wavelength drift detection module and a wavelength drift compensation module; the laser array module comprises a master laser, a plurality of slave lasers with wavelengths to be locked, a plurality of couplers and a switching device; the wavelength drift detection module comprises a wavelength division multiplexing multiplexer / demultiplexer, a modulator, an optical fiber, an optical switch and a balance photoelectric detector; the wavelength drift compensation module comprises an amplifier, a power divider, a frequency mixer and a detector. The relative wavelength drift of the master laser and the slave lasers is converted into a feedback signal through photoelectric detection to adjust the injection current of the slave lasers, and the wavelength drift of the slave lasers changes along with the wavelength of the master laser, so that the wavelength difference between the master laser and the slave laser is stabilized, and wavelength locking is dynamically compensated.
Description
technical field [0001] The invention relates to a laser wavelength locking technology, in particular to a device and method for realizing dynamic locking of a semiconductor laser wavelength, and belongs to the technical field of measurement and testing. Background technique [0002] The peak wavelength of semiconductor lasers will drift due to the influence of operating current and operating temperature, so it is necessary to lock the wavelength of the drifting laser. The specific methods can be divided into internal solutions and external solutions for the laser. The internal solution integrates the wavelength stabilizing structure inside the semiconductor laser bar, while the external solution separates the volume holographic grating from the Bragg grating to stabilize the wavelength. Distributed Feedback Semiconductor Laser (DFB, Distributed Feedback Semi-conductor Laser) is a typical example of an internal solution. The grating for selective feedback spectrum is integrat...
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IPC IPC(8): H01S5/40H01S5/062H01S5/065
CPCH01S5/0622H01S5/0657H01S5/4025
Inventor 陈翰乔钦梁闵靖
Owner SOUTHEAST UNIV