Method and device of stabilizing high power semiconductor laser output wave length
A semiconductor and high-power technology, which is applied in the field of stability of the output wavelength of high-power semiconductor lasers, and can solve problems such as the output wavelength drift of semiconductor lasers
Inactive Publication Date: 2003-09-17
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
View PDF0 Cites 9 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Although this method ensures the constant temperature of the high-power semiconductor laser tube shell, the temperature (operating temperature) of the die increases with the increase of the operating current and the extension of the working time, so the output wavelength of the semiconductor laser will drift.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0009] The principle block diagram of device of the present invention is as figure 1 As shown, it includes: a high-power semiconductor laser (1), an optical signal sampling device (2), a narrowband bandpass filter (3), a photodiode (4), an analog-to-digital converter (5), and a single-chip microcomputer (6) , a digital-to-analog converter (7), an amplifier (8), a temperature control driver (9), and a semiconductor refrigerator (10). Its working process is that the optical signal sampling device (2) takes out part of the optical signal from the high-power semiconductor laser (1) and projects it on the narrow-band band-pass filter (3), and then filters and detects it through the narrow-band band-pass filter (3). Then it is converted into electrical signal by photodiode (4), and input to single-chip microcomputer (6) for processing after being converted by analog-to-digital converter (5), and the control digital signal output by single-chip microcomputer (6) is converted by digit...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A method to make the output wavelength of a semiconductor with stable high power mainly uses the means to only let certain wavelength to transmitted, that is to use band-pass filter in narrow band ofpeak value output wavelength of semiconductor laser with high power at normal temperature to detect the output wavelength of semiconductor laser with high power and the detected result handed over toa single-chip computer for processing after photo-electric conversion and analog-digital conversion are conducted for it, the control signal of the single-chip computer is used to adjust the magnetude of working current submitted by a temperature control driver to a semiconductor refrigerator after it is digital-analog converted and signal amplified in order to stabilize the temperature of tube core for semiconductor laser with high power, and the output wavlength of laser can also be stabilized.
Description
Technical field: [0001] The invention relates to the stability of the output wavelength of a high-power semiconductor laser, and relates to a method and a device for stabilizing the output wavelength of a high-power semiconductor laser. technical background: [0002] The output wavelength of high-power semiconductor lasers drifts with the change of operating temperature. In the prior art, in order to make the high-power semiconductor laser work safely and the output wavelength tend to be stable, a semiconductor refrigerator is generally used to carry out constant temperature cooling on the shell of the laser (see "Precise Constant Temperature Refrigeration of High Power Laser Diodes" published by Chen Liang et al. System", "Laser and Infrared", Volume 29, Issue 4, 1999.8). Although this method ensures the constant temperature of the high-power semiconductor laser tube shell, the temperature (operating temperature) of the die increases with the increase of the operating curr...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/068
Inventor 楼祺洪吴中林
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI