title: Gain-clamped Raman fiber oscillator.
abstract: Gain band expansion of a Raman amplifier based on a Raman fiber oscillator (RFO) was tested with two Raman lasers, which yielded a broad gain spectrum of about 40 nm. However, they also introduced gain-clamping behavior in the short-wavelength range and abnormal excessive gain in long-wavelength channels, which were undesirable for practical application. The proper mechanism of the behavior was analyzed and experimentally demonstrated to apply to a gain-clamped (GC) amplifier based on a RFO. Appropriate configuration of the GC-RFO for wide gain bandwidth was proposed and characterized.
authors.affiliation: High Speed Photonics Team, ETRI, 161 Gajeong-dong Yuseong-gu, Daejeon, South Korea. wisehss@etri.re.kr
authors.forename: H S
authors.initials: HS
authors.lastname: Seo
authors.forename: J T
authors.initials: JT
authors.lastname: Ahn
authors.forename: B J
authors.initials: BJ
authors.lastname: Park
authors.forename: W J
authors.initials: WJ
authors.lastname: Chung