title: Switchable dual-wavelength SOA-based fiber laser with continuous tunability over the C-band at room-temperature.
abstract: We propose and demonstrate a simple compact, inexpensive, SOA-based, dual-wavelength tunable fiber laser, that can potentially be used for photoconductive mixing and generation of waves in the microwave and THz regions. A C-band semiconductor optical amplifier (SOA) is placed inside a linear cavity with two Sagnac loop mirrors at its either ends, which act as both reflectors and output ports. The selectivity of dual wavelengths and the tunability of the wavelength difference (Δλ) between them is accomplished by placing a narrow bandwidth (e.g., 0.3 nm) tunable thin film-based filter and a fiber Bragg grating (with bandwidth 0.28 nm) inside the loop mirror that operates as the output port. A total output power of + 6.9 dBm for the two wavelengths is measured and the potential for higher output powers is discussed. Optical power and wavelength stability are measured at 0.33 dB and 0.014 nm, respectively.
authors.affiliation: Department of Electrical & Telecommunications Engineering Technology, New York City College of Technology, New York, New York, USA. MAUmmy@CityTech.Cuny.edu
authors.forename: M A
authors.initials: MA
authors.lastname: Ummy
authors.forename: N
authors.initials: N
authors.lastname: Madamopoulos
authors.forename: M
authors.initials: M
authors.lastname: Razani
authors.forename: A
authors.initials: A
authors.lastname: Hossain
authors.forename: R
authors.initials: R
authors.lastname: Dorsinville
mesh_terms: D000669:Amplifiers, Electronic; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007834:Lasers; D008872:Microwaves; D013696:Temperature; D055053:Terahertz Radiation