Opposite intercrossed coupling outer cavity semiconductor laser for melting cone fiber

Abstract

The invention relates to a melting cone optical fiber opposite-direction cross coupling external-cavity semiconductor laser, which belongs to the semiconductor laser field, and comprises a semiconductor laser array (1), a fast-axis collimating lens (2), an aligning fixed sleeve (3), a melting cone optical fiber coupler (4) and an output fixed sleeve (5). In the invention, a semiconductor laser is coupled to optical fiber beams by adopting a method that the luminescence units of the semiconductor laser array are in one-to-one correspondence with optical fibers, and the laser beams are coupled by adopting the method of optical fiber bundle melt pull cone, so as to improve the coupling efficiency. The optical fiber beams are divided into two parts which are arranged in the opposite direction in a cross manner and the coupled light directly enters the corresponding luminescence unit, therefore the laser has the advantages of eliminated external-cavity feedback lens, simple structure and lower feedback loss.

Description

technical field [0001] The invention relates to a fusion taper optical fiber oppositely cross-coupled external cavity semiconductor laser, which belongs to the field of semiconductor lasers. Background technique [0002] Due to the advantages of small size, light weight, long life and high efficiency, semiconductor laser arrays have broad application prospects and huge potential markets in military, industrial, medical and other fields, so they have become a research hotspot pursued by countries all over the world. Semiconductor laser array is an effective technical way to achieve high power output. Due to the inherent structural defects of the semiconductor laser array, the output beam quality of each light-emitting unit is very poor, and each light-emitting unit is incoherent, so the output of the laser is also incoherent in space. External cavity phase-locked coherent coupling technology forms a new resonant cavity outside the semiconductor laser array to lock the phase ...

AI Technical Summary

Problems solved by technology

Most of these external cavity structures have disadvantages such as complex structure, large loss, high adjustment accuracy, and difficulty in practical application.

However, the external cavity phase-locked coherent coupling technology can only ensure a strong coupling between adjacent light-emitting units, and cannot form a true "parallel coupling", which is one of the main reasons why high-power coherent laser output cannot be obtained

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