Constant temperature dehumidifying high stable femtosecond laser

A femtosecond laser, high stability technology, used in lasers, laser parts, laser parts and other directions, can solve the problems of unstable mode locking, laser power drop, and the laser cannot work stably for a long time.

Inactive Publication Date: 2005-03-02
TIANJIN UNIV
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Problems solved by technology

The temperature change of the environment will eventually destroy the mode-locking conditions of the laser, resulting in unstable mode-locking. Excessive humidity will also make dust particles in the air easy to attach to the laser cavity mirror, causing the laser power to continue to drop until the mode-locking stops.
Therefore, the laser cannot work stably for a long time

Method used

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  • Constant temperature dehumidifying high stable femtosecond laser

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Embodiment Construction

[0010] The present invention will be further described in conjunction with the accompanying drawings. The constant temperature structure adopts a fully cooled bottom plate. The cooling circulating water flows in from one end of the bottom plate, flows through the entire bottom plate, and then flows out from the other end; all laser components are installed on the water-cooled bottom plate. Then the laser is in a constant temperature working environment. The water-cooling source device adopts a constant-temperature water-cooling device refrigerated by an ordinary compressor, and the temperature instability is <±1°C; or a constant-temperature water-cooling device adopts semiconductor refrigeration, and the temperature instability is <±0.1°C.

[0011] The dehumidification structure of the present invention adopts a sealed cabinet, puts all laser components in it (only the laser input and output holes are left), and places an electronic dehumidifier in the sealed cabinet for suctio...

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Abstract

This constant-temp., moisture-removing and high stability femtosecond laser-device is characterized by: it has a water-cooling base, which water source is a common compresson refrigerator, or a semiconductor refrigerator, its temp. variation less than +(-)0.1 deg.C. All laser parts are fitted on said base in a sealed case, and equipped with electronic moisture-removor, keeping the humidity of inner case less than 30%. Advantages are: the working temp. of the laser device being kept at +(-) 1 deg.C, its working humidity being kept at less than 30%, higher lock-mode stability, stable working for 8-12 hrs.

Description

technical field [0001] The invention relates to a highly stable femtosecond laser with constant temperature and dehumidification, belonging to femtosecond laser devices. Background technique [0002] Since the 1990s, solid-state femtosecond lasers represented by titanium-doped sapphire have gradually replaced dye lasers as the mainstream femtosecond laser products. Femtosecond lasers have been more and more widely used in physics, chemistry, biology, medicine, communication and large science engineering. An important parameter of a femtosecond laser is the stability of operation, including temporal stability (pulse width and repetition frequency jitter), spatial stability (mode change) and power stability (fluctuation of pulse energy). Especially in the application of metrology standards, chemical reaction kinetics and large scientific engineering, the long-term stable operation of femtosecond lasers is very important. [0003] Usually, there a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/02H01S3/042
Inventor 张志刚王请月柴路曹士英
Owner TIANJIN UNIV
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