Large refractive index modulation tilted holographic planar structured grating based on dichromated gelatin

Title
Large refractive index modulation tilted holographic planar structured grating based on dichromated gelatin
Authors
Jihong ZhengShizhuo YinZhiwen LiuJimmy Yao김재헌Chia-En Yang
Keywords
Dichromated gelatin; grating; holographic; Holographic optical elements (HOE); Diffraction gratings; Wavelength filtering devices
Issue Date
2009-05
Publisher
Optics communications
Citation
VOL 282, 1762-1766
Abstract
A new type grating, tilted holographic planar structured dichromated gelatin (DCG) grating with large refractive index modulation, is presented in this paper. The grating is inscribed by superposing two coherent laser beams from the front and the thin side surfaces, respectively. The relationship between the tilted angle and the three types of coupling modes is analyzed when coupling with fiber. Besides, the couple mode theory and experimental investigation are applied on major characteristics analysis of the radiation mode DCG grating of tilted angle 45˚. Due to the tilted planar structured grating has large refractive index modulation, it not only offers convenience for connecting (or integrating) with other fiber or waveguide-based devices, but also provide some special characteristics such as low wavelength selectivity (which is required for some applications such as multiple spectrum biomedical imaging). Therefore, this unique grating device has a wide application in optical fields such as for the waveguide- based, parallel, multiple spectrum imaging system.
URI
http://pubs.kist.re.kr/handle/201004/37038
ISSN
0030-4018
Appears in Collections:
KIST Publication > Article
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