Reduction of coupling loss in many-to-many collimating system for optomechanical matrix switch

Wei Sheng Hu; Qing Ji Zeng

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Reduction of coupling loss in many-to-many collimating system for optomechanical matrix switch

机译：Reduction of coupling loss in many-to-many collimating system for optomechanical matrix switch

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In a many-to-many collimating system using gradient-index-rod lenses (GRINs) for an optomechanical matrix switch, there are multiple cross-connections having different optical path lengths so that excess coupling losses arise. The total coupling loss is greatly reduced by properly choosing the GRIN lengths. Two schemes can do so. In the equal △Z scheme, all GRINs have the same excess length △Z↓(o) than the quarter pitch, which is optimized at 13, 25, and 49 μm for the three focusing parameters of 0.237, 0.326, and 0.417 mm↑(-1), respectively. The total coupling loss is further reduced in the unequal △Z scheme, in which the △Z↓(μ) of each GRIN is independently determined and optimized by numerical computation. The results are preferred rather than the zero △Z scheme where just quarter-pitch GRINs are used.#1998 Society of Photo-Optical Instrumentation Engineers. S0091-3286(98)00906-4 Subject terms: collimating system; gradient-index-rod lens; coupling loss; opto- mechanical matrix switch; many-to-many connection; numerical computation; optical fiber communications. Paper 34107 received Oct. 24, 1997; accepted for publication Jan. 10, 1998.

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《Optical Engineering》 |1998年第6期|1834-1837|共4页
作者
Wei Sheng Hu; Qing Ji Zeng;
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作者单位

Shanghai Jiao Tong University Optical Fiber Technology Institute Broadband Optical Networking Technology Research & Development Center /Shanghai 200030 China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类光学仪器;
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Reduction of coupling loss in many-to-many collimating system for optomechanical matrix switch

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