Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1541051 | Optics Communications | 2008 | 6 Pages |
Abstract
According to the oblique incidence characteristics of thin film narrowband filter, the stack of 100Â GHz DWDM four cavities angle-tuned thin film filter has been designed and optimized. The two polarization modes' central wavelengths of the thin film filter can be centered at the same one in oblique incidence, and it has a stable tuning range of 20Â nm without the phenomenon of polarization central wavelength separation. Using this kind of angle-tuned thin film filter and the polarization beam-splitters, the tuning range of the angle-tuned thin film filter can be further expanded due to the reason that it can transmit only the s-polarization light. In this paper we also developed a three-port bandpass tunable filter device with new structure, which tuning range can cover the whole C-band and its adjacent channel isolation degree is high. The experiments show that the three-port tunable filter has an effective tuning range of 33Â nm, and its adjacent channel isolation degree is more than 35Â dB. It has a bright application opportunity for its flexibility and effective performance.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Kan Yu, Wen Liu, Dexiu Huang, Jing Chang,