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Semiconductor laser module, method for stabilizing and denoising semiconductor laser, and solid laser

A laser module and semiconductor technology, applied in the direction of semiconductor lasers, lasers, laser components, etc., can solve problems such as noise, mode hopping phenomenon, mode allocation, etc., and achieve the effect of improving randomness, eliminating mode hopping, and eliminating mode allocation noise

Inactive Publication Date: 2011-04-13
PAVILION INTEGRATION CORP SUZHOU
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] The state-of-the-art semiconductor lasers still have serious mode hopping and mode distribution noise

Method used

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  • Semiconductor laser module, method for stabilizing and denoising semiconductor laser, and solid laser
  • Semiconductor laser module, method for stabilizing and denoising semiconductor laser, and solid laser
  • Semiconductor laser module, method for stabilizing and denoising semiconductor laser, and solid laser

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Embodiment Construction

[0045] Specific embodiments of the present invention will be described below with reference to the drawings.

[0046] Such as figure 1 As shown, the basic optical structure of the semiconductor laser module 100 includes a laser assembly 110 with a semiconductor laser tube 150 (also called a semiconductor laser) as the core, a collimator lens 120, a feedback signal sampling assembly 130, and a telescope 141 and an auxiliary lens 142. beam shaping assembly 140 . The feedback signal sampling component 130 also includes a beam splitter 132, whose function is to divide the collimated laser output 103 into two parts, most of the light 103a is output after beam shaping, and a small part of the separated light 103b enters the photodiode 135 generates a feedback signal.

[0047] Figure 2b A sampling system for an improved automatic power control system is described. The beam splitter 232 is enclosed in a box 236 . The closed box has only one entrance 237 to receive the light bea...

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Abstract

The invention provides a semiconductor laser module. The semiconductor laser module comprises a semiconductor laser, a drive circuit driving the semiconductor laser, an automatic power control assembly and an optical element which shapes laser emitted by the semiconductor laser, wherein the automatic power control assembly consists of a photodiode, a beam splitter independently arranged in a closed box, a current amplifier, a comparer and a reference signal generator; a feedback signal generated by the photodiode is input to the comparer through the current amplifier, and is compared with a preset reference signal; and direct current bias is adjusted according to the comparison result. The improved automatic power control assembly truly reflects fluctuation of laser output, and improves the effect of automatic power control.

Description

technical field [0001] The invention relates to a semiconductor laser module, a method for stabilizing and reducing noise of a semiconductor laser in the semiconductor laser module, and a solid-state laser comprising the aforementioned semiconductor laser module. Background technique [0002] In order to eliminate the mode hopping phenomenon of semiconductor lasers, the most common method is to use an electronic temperature controller. For example, US Pat. No. 6,590,912 controls the temperature at ±0.5 degrees. However, simple temperature control has very limited effect on stabilizing the semiconductor laser, and cannot completely eliminate the mode hopping phenomenon. Another common method is single-mode output. The disadvantage is that the complexity of the structure and the production cost are greatly increased. Also, a single-mode output is not suitable for many applications. This leads to a design based on the opposite idea, that is, to reduce noise by statistical a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/0683H01S5/065H01S5/042H01S5/024
Inventor 范辉刘理朱声白罗宁一
Owner PAVILION INTEGRATION CORP SUZHOU
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