Open AccessBroadband lightwave synthesized frequency sweeper using self-induced auto-tracking filter
Author(s) -
Zhaoying Wang,
Shiyuan Liu,
Sha Liu,
Quan Yuan,
Rui Ma,
Chunfeng Ge,
Tianxin Yang
Publication year - 2015
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.022134
Subject(s) - fiber bragg grating , optics , span (engineering) , broadband , amplified spontaneous emission , filter (signal processing) , physics , noise (video) , signal (programming language) , materials science , optical fiber , computer science , laser , civil engineering , artificial intelligence , image (mathematics) , computer vision , programming language , engineering
We present a scheme to broaden the sweeping span of lightwave synthesized frequency sweeper (LSFS) by using self-induced auto-tracking filter (SIATF). It is based on spatial-hole-burning effect in unpumped erbium-doped fiber (EDF), equivalent to introducing a Bragg grating. This Bragg grating works as the SIAFT, tracks the frequency of the incident optical signal automatically. It broadens LSFS's sweeping span limited by the homogeneous broadening of EDF. The scheme is demonstrated experimentally that the amplified spontaneous emission (ASE) noise is effectively suppressed meanwhile sweeping span of LSFS is enlarged. 12.48nm sweeping span within 3.5dB power change is obtained, which corresponds to 1.56THz sweeping span.