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High-brightness fiber coupled diode laser with rounded light beam

A laser diode and beam technology, applied in the field of laser diode beam shaping and combination

Pending Publication Date: 2022-05-27
NLIGHT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at least for the above applications, an additional boost to brightness is required

Method used

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  • High-brightness fiber coupled diode laser with rounded light beam
  • High-brightness fiber coupled diode laser with rounded light beam
  • High-brightness fiber coupled diode laser with rounded light beam

Examples

Experimental program
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Embodiment Construction

[0024] The maximum number of emitted beams that can be coupled into a given fiber is typically ultimately determined by the beam parameter product (BPP) of the single-emitter diode laser used to generate the corresponding laser beam. However, in order to maximize the available brightness of the emitted beam, it is also important to optically and physically efficiently arrange the laser diodes to fill the available numerical aperture of the fiber into which the beam is coupled. For example, one problem that hinders maintaining the brightness of a single emitter is the generally rectangular beam shape in both physical and angular space and a mismatch with the circular space of the fiber. Therefore, in the representative example herein, the circular space of the output fiber is filled by beam shaping the diode laser beam, allowing more single-emitter beams to be coupled into the same fiber, so that an increase in brightness can be achieved.

[0025] In various examples herein, hi...

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Abstract

An apparatus includes a plurality of laser diodes configured to emit respective laser diode beams having vertical fast and slow beam divergence axes, the fast and slow beam divergence axes being perpendicular to each other to the respective beam axes, and beam shaping optics configured to shape a plurality of laser diodes configured to emit respective laser diode beams having vertical fast and slow beam divergence axes, the fast and slow beam divergence axes being perpendicular to each other to the respective beam axes. The beam shaping optics are configured to receive the laser diode beam and to rounded a combined image space and an NA space of the laser diode beam at a combined beam coupling plane. In some selected embodiments, the beam shaping optics include a variable fast axis telescope configured to provide a variable fast axis magnification and beam displacement.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims the benefit of US Provisional Application 62 / 886,907, filed August 14, 2019. This application also claims the benefit of US Provisional Application 62 / 886,912, filed August 14, 2019, entitled "VARIABLE MAGNIFICATION AFOCAL TELESCOPEELEMENT". These applications are incorporated herein by reference. [0003] This application is related to US Application 15 / 435,117, filed February 16, 2017, which was issued as U.S. 10,261,261, which is incorporated herein by reference. technical field [0004] The present application belongs to the field of laser diode beam shaping and combining. Background technique [0005] Applications such as fiber laser pumping and materials processing place great demands on high-power, high-brightness fiber-coupled diode lasers. In existing fiber-coupled laser diode packaged devices, multiple single-emitter diode lasers emit individual beams, which are stacked on the fast a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/09
CPCH01S5/0071H01S5/005H01S5/02251H01S5/4012G02B19/0057G02B27/106G02B27/0905G02B27/0955G02B6/4214G02B6/4296G02B19/0014G02B27/123G02B6/4206H01S5/02315G02B27/30H01S5/4025
Inventor 陈之纲J·斯莫M·坎斯卡
Owner NLIGHT INC