National Changhua University of Education Institutional Repository : Item 987654321/18291

English | 正體中文 | 简体中文 | Items with full text/Total items : 6507/11669
Visitors : 29939522 Online Users : 463

RC Version 3.2 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.

Scope Adv. Search

Login ‧ Upload ‧ Help ‧ About ‧ Administer

NCUEIR > College of Science > Graduate Institute of Photonics Technologies > Proceedings > Item 987654321/18291

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/18291

Title:	Wavelength Division Multiplexing Techniques Based on Cascaded Volume Holographic Filters in LiNbO3 Crystals with 90-degree Geometry
Authors:	Lee, Xuan-Hao;Chen, Wen-Hao;Su, Wei-Chia
Contributors:	光電科技研究所
Date:	2006
Issue Date:	2014-04-01T04:00:36Z
Publisher:	SPIE--The International Society for Optical Engineering
Abstract:	A two-channel demultiplexer with channel spacing 1nm and the bandwidth around 1nm is demonstrated. The demultiplexer device is established based on cascaded holographic filters. Each filter addresses a channel. Each filter is established by constructing a single volume holographic gating in a single LiNbO3 crystal and it drops the light from a specific DWDM channel (wavelengths of ~1550nm) with 90-degree geometry. Volume holographic gratings in photorefractive material have been applied to demultiplexer devices in DWDM systems owing to the narrow spectral selectivity. However, when channel numbers in a volume hologram is increased, we have to store more holographic gratings in this recording medium. Thus, the diffraction efficiency of each channel will decrease because all the gratings share the dynamic range of the recording material. In our design, the dynamic range can be efficiently used and thus the diffraction intensities of each channel can be increased. In addition, the device could be compact owing to the 90-degree geometry. In this device, we can increase the channel number by cascading another different filter.
Relation:	Photonics, Devices, and Systems III, Proc. SPIE., 6180: 61801H
Appears in Collections:	[Graduate Institute of Photonics Technologies] Proceedings

Files in This Item:

File	Size	Format
2020600516017.pdf	7Kb	Adobe PDF	397	View/Open

Loading...