Fiber laser having superior resistance to reflection light

Details Fiber laser having superior resistance to reflection light Fiber laser having superior resistance to reflection light

H - Electricity

01

S

H01S 3/06 (2006.01) G02F 1/35 (2006.01) H01S 3/108 (2006.01)

Patent

CA 2693112

An MO-PA fiber laser having a master oscillator; and a first power amplifier which uses as a gain medium, a rare earth-doped optical fiber which is connected to a later stage of the master oscillator, wherein the MO-PA fiber laser has a wavelength conversion portion between the master oscillator and the power amplifier, and has a wavelength filter between the wavelength conversion portion and the master oscillator which only allows wavelength components of pulse light emitted from the master oscillator to pass, thereby making it possible to prevent breakage to a fiber laser which is caused by reflection light without using high-cost optical components.

L'invention concerne un laser à fibres optiques selon le procédé MO-PA comprenant un oscillateur à impulsions et un premier amplificateur à fibres optiques utilisant une fibre optique avec ajout de terres rares raccordée à un stade ultérieur de l'oscillateur à impulsions. Le laser à fibres optiques comprend en outre une unité de conversion de longueur d'onde agencée entre l'oscillateur à impulsions et l'amplificateur à fibres optiques ; et un filtre de longueur d'onde qui est agencé entre l'unité de conversion de longueur d'onde et l'oscillateur à impulsions, et qui transmet seulement la composante de longueur d'onde de la lumière pulsée émise par l'oscillateur à impulsions. Ainsi, il est possible d'empêcher une rupture du laser à fibres optiques par la lumière réfléchie sans utiliser de pièce optique onéreuse.

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