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Tunable light source of pollution detection instrument

A pollution detection and instrument technology, applied in the pollution detection field, can solve the problems of difficult to meet the pollution detection field, poor frequency stability, low spatial resolution, etc., to improve the electro-optical conversion efficiency, improve operability, The effect of improving the coupling efficiency

Inactive Publication Date: 2007-03-14
TIANJIN UNIV
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Problems solved by technology

[0002] Previously used flash lamps, fluorescent lamps, halogen lamps, high-pressure sodium lamps, continuous CO 2 Lasers, pulsed XeCl excimer lasers, 532nm and 355nm Nd:YAG lasers, the spatial resolution is not high, the detection distance is not long, the repetition frequency is not high, the frequency stability is not good, the device ratio is relatively complicated, and it is difficult to adapt to scientific research and industrial production The field puts forward higher requirements for laser instruments, especially it is difficult to meet the requirements of the field of pollution detection

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Embodiment approach

[0028] The second embodiment of the present invention differs from the first embodiment in that the second plane reflector 21 is coated with an anti-reflection coating for pump light and an 850-950nm total reflection film; the second plane output mirror 24 is 850~950nm semi-permeable membrane, the transmittance is 10%.

[0029] The production process of the tunable light source of the present invention is as follows: first, the LD (laser diode) array produces laser light near 808nm, pumps Nd:YAG (Nd-doped yttrium aluminum garnet) rods, and generates fundamental frequency light (1064nm laser), after The frequency doubling of the KTP crystal produces green light (532nm laser), while the Q-switch modulates the laser to output high-power, quasi-continuous green light. After two 45°532nm total reflection mirrors and lens L, the green light is coupled into the Ti:Sapphire resonant cavity. The green light enters the Ti:sapphire crystal at Brewster's angle, and is tuned by a single B...

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Abstract

This invention discloses a tuning light source of a pollution detecting instrument, which comprises pump source, coupling focusing lens and titanium gem resonant chamber connected orderly in the light path. The pump source comprises No.1 reflection mirror, Q switch, laser diode array, monochromatic plane wave, multiple frequency crystal and No.1 outgoing plane mirror which are connected orderly in the light path. The titanium gem resonant chamber comprises No.2 reflection mirror, titanium gem crystal, duplication light filter and No.2 outgoing plane mirror. Employing slice duplication light filter BF as tuning element to decrease inserting wearing and compress the tuning chamber sizes and increase the operability of the laser device. The invention is applicable to pollution detecting and provides whole solid and semi-continuous and tuning laser source.

Description

technical field [0001] The invention belongs to a laser light source, in particular a tunable laser light source, which is applied in the field of pollution detection. Background technique [0002] Previously used flash lamps, fluorescent lamps, halogen lamps, high-pressure sodium lamps, continuous CO 2 Lasers, pulsed XeCl excimer lasers, 532nm and 355nm Nd:YAG lasers, the spatial resolution is not high, the detection distance is not long, the repetition frequency is not high, the frequency stability is not good, the device ratio is relatively complicated, and it is difficult to adapt to scientific research and industrial production The field puts higher requirements on laser instruments, especially it is difficult to meet the requirements in the field of pollution detection. Contents of the invention [0003] The technical problem to be solved by the present invention is to solve the deficiencies in the above-mentio...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/00G01N21/94G02B27/00
Inventor 丁欣姚建铨魏权夫邹雷温午麟于意仲
Owner TIANJIN UNIV
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