The wavelength-switchable and stable erbium-doped fiber laser (EDFL) based on a Mach–Zehnder interferometer (MZI) was
designed and experimentally demonstrated. For the proposed fiber laser, a bitaper MZI was manufactured using extrusion
splicing photonics crystal fiber (PCF) and single-mode fiber to generate the comb filter effect. In the experiment, an
erbium-doped fiber with a length of 3 m was used as the laser gain medium in the cavity. The laser threshold was 95 mW, and
a laser output of 1563.06 nm was obtained. Single-wavelength tunable lasing from 1561.22 to 1563.34 nm with a minimum
tuning space of 0.08 nm was realized. The power fluctuation was lower than 3.261 dB, and the signal-to-noise ratio (SNR)
exceeded 28.535 dB. By tuning the polarization conditions, dual-, triple-, and quadruple-wavelength lasers with power
fluctuations lower than 0.23, 2.94, 6.77 dB, respectively, were realized in the experiment. The 3 dB linewidth for the laser was
less than 0.06 nm. The results indicate that single-, dual-, triple-, and quadruple-wavelength-tunable lasers can be realized
using the proposed fiber laser.
Erbium-doped fiber laser, Mach–Zehnder interferometer, Wavelength tunable, Photonics crystal fiber.
WEI WEI, YANG WANG, GAOLIN QIN, JUNFA DUAN, Wavelength tunable erbium-doped fiber laser based on all-fiber bitaper Mach–Zehnder interferometer incorporating photonic crystal fiber in ring cavity, Optoelectronics and Advanced Materials - Rapid Communications, 16, 11-12, November-December 2022, pp.485-490 (2022).
Submitted at: April 7, 2022
Accepted at: Dec. 5, 2022