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Voltage-controlled current source circuit and its method, semiconductor laser and its bias power supply

A voltage-controlled current source, bias power technology, applied in semiconductor lasers, lasers, laser parts and other directions, can solve the problems of inconvenient debugging, the adjustable range depends on sampling resistance, poor adjustment accuracy, etc., to achieve small ripple Effect

Active Publication Date: 2017-12-12
QUANTUMCTEK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This implementation method has single function, inconvenient debugging, poor adjustment accuracy, and the adjustable range depends on the sampling resistor

Method used

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  • Voltage-controlled current source circuit and its method, semiconductor laser and its bias power supply
  • Voltage-controlled current source circuit and its method, semiconductor laser and its bias power supply
  • Voltage-controlled current source circuit and its method, semiconductor laser and its bias power supply

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0031] As the application of laser technology tends to mature, small semiconductor lasers have been widely used in many fields such as information communication, medical treatment and health, and military technology. Small semiconductor lasers, also known as diode lasers, have the advantages of small size, light weight, high efficiency, and stable performance. The bias power used with the low-power semiconductor laser has a significant impact on the quality of the optical signal generated by the semiconductor laser. For different applications, the bias power needs to have the function of precise ad...

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Abstract

The present invention discloses a voltage-controlled current source circuit and a method thereof, and a semiconductor laser and a bias power supply thereof. The voltage-controlled current source circuit comprises resistors R1-R6, a voltage holding chip U1, a triode Q1, and operational amplifiers U2A and U2B. A control pin of the U1 is used as one input terminal of the voltage-controlled current source circuit via the R1, and an input pin of the U1 is used as another input terminal of the voltage-controlled current source circuit via the R2. An output pin of the U1 is connected with an inverting terminal of the U2A via the R3. A non-inverting terminal of the U2A is grounded via the R5, and an output terminal of the U2A is connected with a non-inverting terminal of the U2B and is also connected with the inverting terminal of the U2A via the R4. An inverting terminal of the U2B is connected with an emitter electrode of the Q1, and an output terminal of the U2B is connected with a base electrode of the Q1. The emitter electrode of the Q1 is connected with a pull-down power supply via the R6, and a collector electrode of the Q1 is used as an output terminal of the voltage-controlled current source circuit. The present invention also discloses a voltage control method of the circuit, a semiconductor laser bias power supply having the circuit, and a semiconductor laser provided with the semiconductor laser bias power supply.

Description

technical field [0001] The present invention relates to a current source circuit, in particular to a voltage-controlled current source circuit, a voltage control method for the voltage-controlled current source circuit, a semiconductor laser bias power supply provided with the voltage-controlled current source circuit, and a semiconductor laser bias power supply provided with the voltage-controlled current source circuit. Semiconductor laser with power supply. Background technique [0002] The bias circuit of the existing semiconductor laser is generally a constant current source circuit cascaded with an operational amplifier and a transistor. If it is necessary to change the current of the DC bias cathode, it is necessary to change the size of the sampling resistor of the emitter of the transistor, and use an adjustable resistor Or replace the resistor. Such an implementation has a single function, is inconvenient to debug, has poor adjustment accuracy, and the adjustable ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/042G05F1/56
CPCG05F1/56H01S5/042
Inventor 刘建宏姚海涛代云启王凯迪
Owner QUANTUMCTEK
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