Device for stabling semiconductor laser operation wavelength

A working wavelength and semiconductor technology, applied in the field of lasers, can solve the problems of non-working status and failure to maintain, and achieve the effect of low price and full feasibility

CN101017957AInactive Publication Date: 2007-08-15SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2007-08-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The device for stabilizing semiconductor laser working wavelength comprises: a light collector set on the back cavity of the laser chip, output end of the collector connects with a fiber coupler through optic fiber, one output path of the coupler connected with the first input end of a SCM through a optical filter and a second detector, another output path of the coupler connected with the second input end through a first detector; a thermistor with output end connected with the third input end of the SCM, and the SCM with its first / second output end connected with the control end of the refrigerator power / the laser drive power. This invention ensures accurate laser length with low cost, and has no effect on laser and its package structure.
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Description

technical field

[0001] The invention relates to lasers, in particular to a device for stabilizing the working wavelength of semiconductor lasers used for pumping solid lasers. Background technique

[0002] All-solid-state lasers pumped by high-power semiconductor lasers are a hot spot in recent years. Compared with the flash lamp pump light source, the semiconductor laser pump light source has outstanding advantages. Semiconductor lasers have high electro-optical conversion efficiency, small size and easy to use. More importantly, its spectrum matches well with the absorption spectrum of the laser material, so the thermal effect generated is small, which is very conducive to improving the working stability and beam quality of solid-state lasers.

[0003] However, the emission wavelength of a semiconductor laser varies greatly with its operating temperature. This temperature relationship is mainly derived from the temperature relationship of the band gap of semiconductor m...

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0036] The structure of the device for stabilizing the operating wavelength of the semiconductor laser of the present invention is shown in FIG. 2 . Among the figure: 101 is a light collector; 101a is a bonding point for fixing the light collector 101; 102 is a light guide fiber; 103 is a filter; 104 is a detector; 105 is a single-chip microcomputer. As can be seen from the figure, the device for stabilizing the operating wavelength of a semiconductor laser in the present invention, the chip 1 of the semiconductor laser is placed on the heat sink 2, the heat sink 2 is connected to the positive pole of the semiconductor laser drive power supply 11, and the upper electrode 3 of the laser is used. 4 is isolated from the heat sink 2 and connected to the negative pole of the sem...