Continuously adjustable drive source device of small-power semiconductor laser

A semiconductor and laser technology, applied in the field of constant current source driven by low-power semiconductor lasers, can solve problems such as no good solution and damage to semiconductor lasers, and achieve strong anti-interference ability and avoid damage

Active Publication Date: 2011-05-18
成都太科光电技术有限责任公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The existing semiconductor laser driving source partially solves the anti-interference problem of the system, but t

Method used

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  • Continuously adjustable drive source device of small-power semiconductor laser
  • Continuously adjustable drive source device of small-power semiconductor laser
  • Continuously adjustable drive source device of small-power semiconductor laser

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Embodiment Construction

[0017] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, but the protection scope of the present invention should not be limited thereto.

[0018] see first figure 1 , figure 1 It is a schematic circuit diagram of the continuous adjustable low-power semiconductor laser drive device of the present invention. It can be seen from the figure that the composition of the continuous adjustable low-power semiconductor laser drive device of the present invention includes: a positive pole 1 wiring voltage stabilizing module U1 of a DC power supply voltage source VCC1 The input terminal of the DC power supply voltage source VCC1 is grounded 2, and the positive output terminal of the linear voltage stabilizing module U1 and the ground terminal are jointly used as the linear stabilizing power supply of the driving source device;

[0019] The positive electrode 3 of the linear voltage stabilizing module U1 forms a chargin...

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Abstract

The invention discloses a continuously adjustable drive source device of a small-power semiconductor laser. A power source has the function of current slow-change protection, and an output current slowly rises to a working current of a laser diode when the power source is opened, thereby avoiding the condition that the power source is suddenly opened to generate an overlarge positive current gradient so as to break a semiconductor laser. When the power source is closed or the outside suddenly has power failure, the power source can still continuously supply the power to the laser diode, and then the current is slowly reduced to zero, thereby avoiding the condition that the power source suddenly has failure to generate an overlarge negative current gradient so as to break the laser diode. In addition, the power source further has the functions of reverse protection and maximum and minimum working current limitation. In the invention, the device can provide continuously adjustable, stable, reliable and constant drive current with strong resistance to interference for the small-power semiconductor laser; and the device can continuously adjust the output current within 10-100mA as required, and the current ripple peak value is not larger than 0.5% within 10-100mA output range.

Description

technical field [0001] The invention relates to a low-power semiconductor laser drive power supply, in particular to a low-power semiconductor laser drive constant current source for testing and measurement. Background technique [0002] Semiconductor laser is a kind of electroluminescent device, and the low-power semiconductor laser with output power less than 10mW is more and more widely used in the fields of testing, measurement, optical communication and spectral analysis. When a stable current is input to the semiconductor laser, it will emit laser light of a certain wavelength. The output light of the semiconductor laser will be unstable due to the instability of the input current of the driving power supply, especially when the power supply is suddenly turned on or off, the semiconductor laser is subjected to a large forward or reverse current gradient due to a sudden change in current, and cause damage to the semiconductor laser. Usually, the cause of semiconductor...

Claims

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Application Information

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IPC IPC(8): H01S5/042H03K3/86
Inventor 赵智亮陈立华
Owner 成都太科光电技术有限责任公司
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