Light guide device, light guide method, and ld module

A light guide device and light beam technology, which is applied in semiconductor laser optical devices, semiconductor lasers, optics, etc., can solve problems such as the limit of reliability improvement, and achieve the effect of improving reliability

Inactive Publication Date: 2018-10-23
THE FUJIKURA CABLE WORKS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In existing LD modules, there is a limit to the improvement of reliability due to the widening of the emitter width due to the upper limit of the emitter width

Method used

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  • Light guide device, light guide method, and ld module
  • Light guide device, light guide method, and ld module
  • Light guide device, light guide method, and ld module

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach 〕

[0032] refer to figure 1 and figure 2 The LD module 1 according to the first embodiment of the present invention will be described. figure 1 It is a plan view showing the structure of the LD module 1 . figure 2 It is a cross-sectional view showing a beam profile of a laser beam, a partial beam, or a partial beam group in each part of the LD module 1 .

[0033] Such as figure 1 As shown, the LD module 1 includes a laser diode LD, a collimator lens CL1, a split optical system 11 (a split mirror DM), a composite optical system 12 (a first mirror RM1, a second mirror RM2, a polarization rotation element PRE, a polarization beam combiner PBC), condenser lens CL2 and optical fiber OF. In the LD module 1 , the collimator lens CL1 , the splitting optical system 11 , the combining optical system 12 , and the condenser lens CL2 constitute a light guide device that guides laser light output from the laser diode LD to the optical fiber OF.

[0034] The laser diode LD outputs a lase...

no. 2 approach 〕

[0060] refer to image 3 and Figure 4 The LD module 2 of the second embodiment of the present invention will be described. image 3 It is a plan view showing the structure of the LD module 2 . Figure 4 It is a cross-sectional view showing a beam profile of a laser beam, a partial beam, or a partial beam group in each part of the LD module 2 .

[0061] Such as image 3 As shown, the LD module 2 includes a laser diode LD, a collimator lens CL1, a split mirror DM, a first mirror RM1, a second mirror RM2, a third mirror RM3, a polarization rotation element PRE, a polarization beam combiner PBC, Condenser lens CL2 and optical fiber OF. In the LD module 2, the collimator lens CL1, the split mirror DM, the first mirror RM1, the second mirror RM2, the third mirror RM3, the polarization rotation element PRE, the polarization beam combiner PBC and the condenser lens CL2 constitute A light guiding device that guides the laser light output from the laser diode LD to the optical fib...

no. 3 approach 〕

[0085] refer to Figure 5 and Figure 6 The LD module 3 according to the third embodiment of the present invention will be described. Figure 5 Among them, (a) is a plan view showing the configuration of the LD module 3 , and (b) is a perspective view showing the configuration of the double mirror DRM included in the LD module 3 . Figure 6 It is a cross-sectional view showing a beam profile of a laser beam, a partial beam, or a partial beam group in each part of the LD module 3 .

[0086] Such as Figure 5 As shown in (a), the LD module 3 includes a laser diode LD, a collimator lens CL1, a split mirror DM, a first mirror RM1, a second mirror RM2, a third mirror RM3, a fourth mirror RM4, a double Mirror DRM, condenser lens CL2 and optical fiber OF. In the LD module 3, the collimator lens CL1, the split mirror DM, the first mirror RM1, the second mirror RM2, the third mirror RM3, the fourth mirror RM4, the double mirror DRM and the condenser lens CL2 constitute A light gui...

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PUM

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Abstract

In order to improve the reliability of an LD module without causing a decrease in the coupling efficiency of a laser diode and an optical fiber, this light guide device is mounted on an LD module (1),the light guide device having a division optical system (DM) that generates partial beam groups by dividing a laser beam, and a synthesis optical system (RM1, RM2, PRE, PBC) that synthesizes the partial beam groups and thus generates a partial beam bundle comprising a plurality of partial beams which have an S-axis parallel to a specific spatial axis.

Description

technical field [0001] The invention relates to a light guiding device and a light guiding method for guiding laser beams. It also relates to an LD module including the light guide device. Background technique [0002] An LD module that includes a laser diode and an optical fiber and inputs a laser beam output from a laser diode to an optical fiber is widely used. In order to improve the reliability of such LD modules, it is necessary to increase the mean time between failures of laser diodes. [0003] As a technique for prolonging the mean time between failures of laser diodes, for example, techniques described in Patent Documents 1 and 2 are known. The technique described in Patent Document 1 suppresses the generation of COD (Catastrophic Optical Damage) by treating the end face of the LD with a treatment liquid having an effect of suppressing generation of surface levels. In addition, the technology described in Patent Document 2 lowers the optical confinement factor (...

Claims

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Application Information

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IPC IPC(8): H01S5/022G02B6/27G02B6/42
CPCG02B6/42G02B6/27G02B6/4206G02B27/0905G02B27/283H01S5/4012H01S5/005H01S5/0071G02B27/106G02B27/143H01S5/02251G02B6/4213
Inventor 葛西洋平
Owner THE FUJIKURA CABLE WORKS LTD
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