Optical fibre coherence coupling method for large power semiconductor laser array and optical fibre shaper

A laser array and semiconductor technology, applied in the laser field, can solve problems such as ineffective coupling of beams and interruption of periodic structures, and achieve the effect of improving the degree of phase-locked coherence of the external cavity, reducing loss, and realizing parallel coupling
CN1738119AInactive Publication Date: 2006-02-22JIAXING DAHE LASER EQUIP
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
JIAXING DAHE LASER EQUIP
Publication Date
2006-02-22
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to a fiber coherence coupling method of high power semi-conductor laser array and the fiber-shaping device, belonging to the laser technique field. The characters of invention comprise: guiding the fiber into the space between the semiconductor laser array and the external-cavity glass; using microlens to compress the fast axis divergence angle of each luminous unit, to make N luminous units be coupling to N fibers one to one; utilizing the flexibility of fiber, rearranging the fiber on the another end of fiber into the fiber array with bidimensional periodic time. The designed fiber shaping device is arranged between the semi-conductor laser array (1) and the external-cavity glass (6), comprising aligning hub (3), fiber (4) and rearrangement hub (5); the compressed fiber, via the microlens, is one-to-one coupling to the fiber which is fixed in the aligning hub, while the rearrangement hub rearranges and fixes another end of with bidimensional fiber. The invention reaches the rearrangement of luminous light beam and improves the coherence coupling of high power semi-conductor laser array.
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Description

technical field

[0001] The invention relates to a method and a device for performing beam shaping on a high-power semiconductor laser array through an optical fiber, realizing phase-locking of an external cavity and improving beam quality, and belongs to the field of laser technology. Background technique

[0002] Semiconductor laser arrays (including one-dimensional semiconductor laser arrays and two-dimensional semiconductor laser arrays, namely semiconductor laser stacks (stack), stacked arrays are composed of one-dimensional arrays stacked together) are effective technologies for achieving high power output way. Since each light-emitting unit of the semiconductor laser array (DLA) is incoherent, the output of the laser is also incoherent in space, and the beam quality is poor. External cavity phase-locked coherent coupling technology forms a new resonant cavity outside the semiconductor laser array to lock the phase of each laser unit, and can obtain coherently coupled ...

Claims

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