26 November 2007 Study of spectrum flattening of ASE fiber source based on long period fiber grating
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Proceedings Volume 6830, Advanced Sensor Systems and Applications III; 68301G (2007); doi: 10.1117/12.756557
Event: Photonics Asia 2007, 2007, Beijing, China
Abstract
Flattened ASE fiber sources with C+L bandwidth(1520-1620nm) are attractive. Long period fiber gratings (LPFG) have the characteristics of band-stopped, which can be used to flatten the spectrum of amplified spontaneous emission (ASE) light source. In this paper, spectrum flattening of ASE light source covering C-band and L-band based on a long period fiber grating is studied. As a flattening filter, LPFG is often placed in the end of the output port. The results in this paper show that the placed position of LPFG has great influence on the spectrum flattening of ASE light source. Output spectrum measured of filtered ASE source with the LPFG at different position is given, and the detailed theoretical analysis to explain the experimental results is followed. In the dual-stage double-pass structure, based on a long period fiber grating and two 980 nm high power semiconductor lasers, high power and ultra bandwidth ASE fiber source has been gained. The source has a bandwidth of 77 nm (1525.5 ~1602.5 nm) with ±1.6 dB ripple and 42 mw of output power.
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Hui-min Yue, Zhong-hua Ou, Zhi-yong Dai, Yong-zhi Liu, "Study of spectrum flattening of ASE fiber source based on long period fiber grating", Proc. SPIE 6830, Advanced Sensor Systems and Applications III, 68301G (26 November 2007); doi: 10.1117/12.756557; https://doi.org/10.1117/12.756557
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KEYWORDS
Superluminescent sources

Optical filters

Light sources

Structured optical fibers

Erbium

L band

Semiconductor lasers

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