A scanning light source wavelength range locking device
A wavelength range and locking device technology, applied in the field of scanning light source wavelength range locking devices, can solve the problems of complex manufacturing process, high design difficulty, inconvenient use, etc., and achieve the effects of simple manufacturing process, simple structure and cost reduction.
Active Publication Date: 2018-05-18
SHENZHEN GOLIGHT TECH
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide a scanning device with simple design, simple manufacture, low cost, convenient and flexible use, aiming at the above-mentioned defects in the prior art that are difficult to design, complicated in manufacturing process, high in cost and inconvenient to use. Light source wavelength range locking device
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[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0022] figure 1 It is a schematic diagram of the comparison between the actual scanning range of the wavelength of the scanning light source and the available wavelength range in the prior art; figure 2 It is a structural schematic diagram of a fixed-point scanning fiber laser based on a broadband bandpass filter in the prior art.
[0023] In the embodiment of the scanning light source wavelength range locking device of the present invention, the structural diagr...
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The present invention proposes a scanning light source wavelength range locking device, comprising a scanning light source, a first narrowband filter, a second narrowband filter, a first photodetector, a second photodetector and a control unit; the output end of the scanning light source is connected to the The input end of the first narrowband filter is connected, the transmission output end of the first narrowband filter is connected with the input end of the second narrowband filter, and the reflection output end of the first narrowband filter is connected with the input end of the first photodetector, The reflection output end of the second narrowband filter is connected with the input end of the second photodetector, the transmission output end of the second narrowband filter outputs the laser scanning signal, and the input end of the control unit is respectively connected with the first photodetector output end and the second photodetector output end. The output end of the photodetector is connected, and the output end is connected with the input end of the driving signal of the scanning light source. The scanning light source wavelength range locking device implemented in the present invention has the following beneficial effects: simple design, simple manufacture, reduced cost, and convenient and flexible use.
Description
technical field [0001] The invention relates to the optoelectronic field, in particular to a scanning light source wavelength range locking device. Background technique [0002] At present, scanning fiber lasers are widely used in fiber grating sensing and optical tomography systems. Optical amplifiers (such as erbium-doped fiber amplifiers (EDFA) or semiconductor optical amplifiers (SOA)) are usually used as gain media, and tunable Fabry- The Poirot (FP) filter or micro-electromechanical system (MEMS) filter is a frequency selector, and a resonant cavity is formed by using an optical mirror or an optical fiber ring to achieve wavelength-tunable laser output. Since the central wavelength of the tunable FP filter or MEMS filter will drift with the ambient temperature, humidity, driving voltage drift and device aging, in order to completely cover the target wavelength range, the wavelength scanning range of the tunable FP filter or MEMS filter It is often much larger than the...
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IPC IPC(8): H01S3/13H01S3/067
Inventor 林小龙张松伟余新文
Owner SHENZHEN GOLIGHT TECH