NEAR-FIELD WAVE-FRONT MEASUREMENTS OF SEMICONDUCTOR-LASER ARRAYS BY SHEARING INTERFEROMETRY

被引：9
作者：
CHERNG, CP
SALVI, TC
OSINSKI, M
MCINERNEY, JG
机构：
[1] University of New Mexico, Center for High Technology Materials, Albuquerque, NM
来源：
APPLIED OPTICS | 1990年 / 29卷 / 18期
关键词：
D O I：
10.1364/AO.29.002701
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A reliable technique for measuring near field phase fronts of phased-array semiconductor lasers is proposed and demonstrated. Laterally sheared interferograms are generated in a ring-type interferometer with zero optical path difference between two beams, eliminating problems due to equal optical path requirements in other systems. Fourier transform methods are used to extract phase difference information from the nonuniformly illuminated interferograms, and phase discontinuities between adjacent stripes of carrier-guided laser arrays are observed. Test data agree with theoretical predictions and far field interpretations. © 1990 Optical Society of America.
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页码：2701 / 2706
页数：6
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