Side-polished fiber based gain-flattening filter for erbium doped fiber amplifiers
- 作者：R.K. Varshney ; A. Singh ; K. P ; e ; B.P. Pal
- 关键词：EDFA ; Gain-flattening filters ; Modeling of side polished fiber devices and sensors ; Fiber to waveguide couplers ; Non-uniform depth of polishing
- 刊名：Optics Communications
- 出版年：2007
- 期刊代码：50_00304018
- 类别：ph
- 出版时间：15 March 2007
- 卷：271
- 期：2
- 页码：441-444
- 文件大小：209 K
摘要
A simple and accurate novel normal mode analysis has been developed to take into account the effect of the non-uniform depth of polishing in the study of the transmission characteristics of optical waveguide devices based on loading of a side-polished fiber half-coupler with a multimode planar waveguide. We apply the same to design and fabricate a gain-flattening filter suitable for fiber amplifiers. The wavelength dependent filtering action of the overall device could demonstrate flattening of an EDFA gain spectrum within ±0.7 dB over a bandwidth of 30 nm in the C-band. Results obtained by the present analysis agree very well with our experimental results. This present analysis should be very useful in the accurate design and analysis of any SPF-MMOW device/component including side-polished fiber based sensors.