Side-polished fiber based gain-flattening filter for erbium doped fiber amplifiers |
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Authors: | RK Varshney A Singh K Pande BP Pal |
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Institution: | Department of Physics, Indian Institute of Technology Delhi, New Delhi 110 016, India |
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Abstract: | 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. |
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Keywords: | EDFA Gain-flattening filters Modeling of side polished fiber devices and sensors Fiber to waveguide couplers Non-uniform depth of polishing |
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