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Optical Engineering

Hybrid grism-lens device for diffraction grating demultiplexers
Author(s): Hsiao-Chin Lan; Chao-Chia Cheng; Chih-Ming Wang; Mao-Jen Wu; Jenq-Yang Chang
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Paper Abstract

A hybrid grism lens, which integrates an off-axis diffractive grating and an on-axis refractive lens onto a prism structure, is developed. The proposed grism lens can simplify the setup of grating-based wavelength-division multiplexing (WDM) device owing to the dual-functional characters combined within only one element. The 100-GHz dense WDM (DWDM) device based on the grism lens is designed with an insertion loss of 2.91±0.53 dB and a crosstalk of 58.02 dB. The tolerance analysis, the allowable grating tilt angle of ±0.5 deg and fiber displacement of ±1 µm, shows that the proposed structure could be practically applied to the grating-based demultiplexers.

Paper Details

Date Published: 1 August 2006
PDF: 5 pages
Opt. Eng. 45(8) 085002 doi: 10.1117/1.2278470
Published in: Optical Engineering Volume 45, Issue 8
Show Author Affiliations
Hsiao-Chin Lan, National Central Univ. (Taiwan)
Chao-Chia Cheng, National Central Univ. (Taiwan)
Chih-Ming Wang, National Central Univ. (Taiwan)
Mao-Jen Wu, National Central Univ. (Taiwan)
Jenq-Yang Chang, National Central Univ. (Taiwan)

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