Fiber grating feedback stabilization of broad area laser diode

Details Fiber grating feedback stabilization of broad area laser diode Fiber grating feedback stabilization of broad area laser diode

H - Electricity

01

S

H01S 5/068 (2006.01) G02B 6/42 (2006.01) H01S 5/10 (2006.01) H01S 5/14 (2006.01) H01S 5/20 (2006.01) H01S 5/40 (2006.01) H01S 5/50 (2006.01)

Patent

CA 2329089

The laser device of the present invention includes a high-power, fiber-coupled optical source having a broad area laser diode (10) with a high reflective coating at its rear facet (12), coupling optics (20), and an optical fiber (30) having fiber grating (32). The fiber grating (32) serves to reflect a portion of the optical beam back to the broad area laser diode (10), thereby stabilizing the wavelength of the optical beam. The fiber grating (32) and the rear facet (12) of the broad area laser diode (10) serve as nodes for an external resonator, thereby limiting the diffraction of the optical beam. The effects of wavelength fluctuation and beam diffraction are reduced together using minimal mechanical components.

L'invention concerne un dispositif laser comprenant une source optique haute puissance à couplage de fibre qui comprend une diode (10) laser à grande surface présentant un revêtement à haute réflectivité sur sa facette (12) arrière, des systèmes (20) optiques de couplage, et une fibre (30) optique comprenant un réseau (32) réflecteur. Ce réseau (32) sert à réfléchir une partie du faisceau optique pour le renvoyer vers la diode (10) à grande surface, ce qui stabilise la longueur d'onde du faisceau optique. Le réseau (32) de la fibre et la facette (12) arrière de la diode (10) à grande surface servent de noeuds à un résonateur externe ce qui limite la diffraction du faisceau optique. Les effets de la fluctuation de longueur d'onde et de la diffraction du faisceau sont ainsi réduits ensemble avec un minimum de composants mécaniques.

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