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All-fiber semiconductor laser frequency stabilization device

A semiconductor and laser technology, applied in the field of all-fiber semiconductor laser frequency stabilization devices, can solve the problems of uncontrollable feedback light intensity, complex optical path adjustment, poor robustness, etc., to avoid complex optical path adjustment, flexible adjustment, and good robustness. Effect

Active Publication Date: 2017-11-14
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By introducing incoherent optical feedback, this technology locks the frequency of the semiconductor laser on the saturated absorption peak of the 852nm band of cesium atoms, and compresses the frequency stability of the semiconductor laser from 96MHz to 6.6MHz, which can break through the limitation of the bandwidth of electrical feedback stabilization , and does not require precision electronics and laser tuning actuators to participate in the frequency stabilization process, but because the optical path of this technology is built with volume optical elements, it has disadvantages such as complex optical path adjustment, uncontrollable feedback light intensity, large volume, and poor robustness.

Method used

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  • All-fiber semiconductor laser frequency stabilization device
  • All-fiber semiconductor laser frequency stabilization device
  • All-fiber semiconductor laser frequency stabilization device

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Effect test

Embodiment 1

[0022] see Figure 4 , the frequency discrimination unit 6 described in this embodiment is a fiber grating Fabry-Perot interferometer formed by sequentially connecting polarization-maintaining fiber grating 61, polarization-maintaining fiber 62 and polarization-maintaining fiber grating 63. The input and output ports are both polarization maintaining fibers. The specific operation steps are as follows:

[0023] 1. Connect the output end of the semiconductor laser controller 2 to the input end of the semiconductor laser light source 1, adjust the current of the semiconductor laser controller so that the output power of the semiconductor laser light source 1 meets the requirements, and connect the first fiber coupler 3, optical fiber Polarization beam splitter 4 , fiber isolator 5 , polarization maintaining fiber grating 61 , polarization maintaining fiber 65 , polarization maintaining fiber grating 63 , second fiber coupler 7 , adjustable fiber attenuator 8 , photodetector 9 ,...

Embodiment 2

[0029] see Figure 5 The frequency discrimination unit 6 described in this embodiment is composed of a photonic crystal fiber gas absorption cell 64, a polarization controller 65, and a polarizer 66 connected in sequence, and the photonic crystal fiber gas absorption cell used is referred to (Couny F, Benabid F, Light P S.Reduction of Fresnel Back-Reflection at Splice InterfaceBetween Hollow Core PCF and Single-Mode Fiber[J].IEEE Phtonics Technology Letters,2007,19(13):1020-1022). The specific operation steps are as follows:

[0030] 1. Connect the output end of the semiconductor laser controller 2 to the input end of the semiconductor laser light source 1, adjust the current of the semiconductor laser controller so that the output power of the semiconductor laser light source 1 meets the requirements, and connect the first fiber coupler 3, Fiber polarization beam splitter 4, fiber isolator 5, photonic crystal fiber gas absorption cell 64, polarization controller 65, polarize...

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Abstract

An all-fiber semiconductor laser frequency stabilization device, the structure of the device includes a semiconductor laser light source, a semiconductor laser controller, a fiber coupler, a fiber polarization beam splitter, a fiber isolator, a frequency discrimination unit, a fiber coupler, an adjustable optical fiber Attenuators, Photodetectors, Oscilloscopes. The optical feedback loop of the present invention is an all-fiber structure, and uses the incoherent optical feedback technology of the semiconductor laser to stabilize the output frequency of the semiconductor laser on the hypotenuse of the transmission spectrum generated by the frequency discrimination unit. The invention can break through the bandwidth limitation of electrical feedback frequency stabilization, can realize simultaneous suppression of low-frequency noise and high-frequency intrinsic noise of semiconductor lasers, and has the advantages of simple optical path construction, compact structure, light weight and good robustness.

Description

technical field [0001] The invention relates to a semiconductor laser, in particular to an all-fiber semiconductor laser frequency stabilization device, which can be applied to the fields of laser atom cooling, laser radar and the like. Background technique [0002] Due to its small size, high efficiency, and flexible wavelength selection, semiconductor lasers are widely used in the fields of optical frequency standards, high-resolution spectroscopy, precision measurement, and optical communications. In the above applications, the frequency stability of lasers is An extremely important indicator parameter. For ordinary free-running semiconductor lasers, due to the influence of the working environment, the long-term stability of the laser output frequency is poor. Therefore, semiconductor laser frequency stabilization technology is playing an increasingly important role in modern science. In the initial stage of laser frequency stabilization, methods such as constant tempera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/0687
Inventor 魏芳蔡海文董作人陈迪俊孙延光瞿荣辉
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI