WAVELENGTH BEAM COUPLING SYSTEM

To suppress reduction in intensity of a laser beam emitted from a wavelength beam coupling system.SOLUTION: A wavelength beam coupling system includes a laser diode bar having a plurality of emitters arranged side by side from a first end side to a second end side, and a heating element arranged to...

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Bibliographic Details
Main Author YAMASHITA MASAYA
Format Patent
LanguageEnglish
Japanese
Published 20.01.2023
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Summary:To suppress reduction in intensity of a laser beam emitted from a wavelength beam coupling system.SOLUTION: A wavelength beam coupling system includes a laser diode bar having a plurality of emitters arranged side by side from a first end side to a second end side, and a heating element arranged to be closer to the second end side than the plurality of emitters, an optical element for collecting beams emitted from the plurality of emitters, a diffraction grating for diffracting the beams collected by the optical element, an external resonance mirror for externally resonating some of the beams diffracted by the diffraction grating, and a controller for controlling power to be supplied to the plurality of emitters and the heating element. The laser diode bar is arranged in such a posture that the lock wavelength of an emitter located on the second end side is longer than the lock wavelength of an emitter located at the first end side at which oscillation caused by external resonance occurs, and the controller controls power to be supplied to the heating element such that the temperature of the heating element is higher than the temperatures of the plurality of emitters.SELECTED DRAWING: Figure 2 【課題】波長ビーム結合システムから射出されるレーザビームの強度の低下を抑制すること。【解決手段】波長ビーム結合システムは、第1端側から第2端側に向けて並べて配置された複数のエミッタ、および、複数のエミッタよりも第2端側に配置された発熱体を備えるレーザダイオードバーと、複数のエミッタから射出されるビームを集光する光学要素と、光学要素によって集光されたビームを回折する回折格子と、回折格子によって回折されたビームの一部を外部共振させる外部共振ミラーと、複数のエミッタおよび発熱体に供給する電力を制御する制御装置と、を備え、レーザダイオードバーは、第1端側に位置するエミッタにおける外部共振による発振が起こるロック波長よりも第2端側に位置するエミッタにおけるロック波長が長くなる姿勢で配置され、制御装置は、発熱体の温度が複数のエミッタの温度より高くなるように、発熱体に供給する電力を制御する。【選択図】図2
Bibliography:Application Number: JP20210112783