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Mode characteristics of the multiple-stripe laser effects of the loss embedded in the outer unpumped region

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3 Author(s)
Suemune, Ikuo ; Hiroshima University, Shitami, Saijocho, Higashi-hiroshima, Japan ; Fujii, H. ; Yamanishi, M.

The criteria for the mode selections in multiple-stripe lasers are presented. It is shown that the couplings of the higher-order modes of each stripe, which constitute the multiple-stripe laser, play important roles in the mode selections. Based on this analysis, a method for realizing 0° phase-shift mode oscillations is proposed. The method involves loss embedment in the outer unpumped region and the use of multiple stripes with fine center-to-center spacings. For the realization of this scheme, a grating-incorporated channeled-substrate planar (GICSP) laser is proposed and is fabricated. It is demonstrated that the 180° phase-shift mode is completely suppressed with this scheme. Single-longitudinal mode oscillations of well-defined index-guided 0° modes are observed for wide-channel CSP lasers.

Published in:

Lightwave Technology, Journal of  (Volume:4 ,  Issue: 7 )

Date of Publication:

Jul 1986

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