1 August 2006 Hybrid grism-lens device for diffraction grating demultiplexers
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Optical Engineering, 45(8), 085002 (2006). doi:10.1117/1.2278470
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.
Hsiao-Chin Lan, Chao-Chia Cheng, Chih-Ming Wang, Mao-Jen Wu, Jenq-Yang Chang, "Hybrid grism-lens device for diffraction grating demultiplexers," Optical Engineering 45(8), 085002 (1 August 2006). http://dx.doi.org/10.1117/1.2278470
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KEYWORDS
Diffraction gratings

Wavelength division multiplexing

Demultiplexers

Diffraction

Dense wavelength division multiplexing

Prisms

Tolerancing

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