Switchable dual‐wavelength single‐longitudinal‐mode erbium‐doped fiber laser based on a thin‐core fiber comb filter and saturable absorber

Abstract

A tunable dual‐wavelength single‐longitudinal‐mode erbium‐doped fiber laser using thin‐core fiber comb filter (TCFCF) and a saturable absorber is proposed. TCFCF is achieved by splicing a thin‐core fiber between two single‐mode fibers. Two lasers incurred shifts of 1 and <3 pm, and corresponding 3‐dB linewidths are 3.4 and 3.0 kHz, respectively. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:287–292, 2015