Ultra-Broadband Amplified Spontaneous Emission Source
by Using Heterogeneous Optical Amplifier¹

C. H. Yeh^a, *, C. W. Chow^b, J. H. Chen^c, and S. S. Lu^b

^a Information and Communications Research Laboratories, Industrial Technology Research Institute (ITRI),
Chutung, Hsinchu 31040, Taiwan

^b Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University,
Hsinchu 30010, Taiwan

^c Department of Photonics, Feng Chia University, Taichung 40724, Taiwan

*e-mail: depew@itri.org.tw; yeh1974@gmail.com

Received June 7, 2012; in final form, June 16, 2012; published online October 1, 2012

Abstract—In this work, we propose and experimentally investigate an ultra-broadband amplified spontaneous
emission (ASE) light source with 113.8 nm bandwidth (1446.2 to 1560.0 nm) by using a cascaded two-stage
optical amplifier, which is consisted of semiconductor optical amplifier (SOA, 1st stage) and erbium-doped
fiber amplifier (EDFA, 2nd stage), when the output intensity is above –35 dBm/0.01 nm. And, the EDFA only
uses a 3 m long erbium-doped fiber (EDF) with a 27 mW pumping power and SOA is driven at 200 mA bias
current. Moreover, the proposed amplifier also can provide a broadband gain amplification of 114 nm in the
wavelengths of 1464.0 and 1578.0 nm with the noise figure distribution of 6.8 to 8.1 dB.

DOI: 10.1134/S1054660X12110163

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