A stable dual-wavelength fiber laser with tunable wavelength spacing using a polarization-maintaining linear cavity |
| |
Authors: | D Liu NQ Ngo XY Dong SC Tjin P Shum |
| |
Institution: | (1) Photonics Research Center, School of Electrical & Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore, Singapore;(2) Network Technology Research Center (NTRC), Research TechnoPlaza, Nanyang Technological University, 50 Nanyang Drive, Singapore, 637553, Singapore |
| |
Abstract: | We propose and experimentally demonstrate a stable dual-wavelength erbium-doped polarization-maintaining (PM) fiber laser
with tunable wavelength spacing using an all-PM linear cavity that makes use of two reflection peaks from the PM fiber Bragg
grating (PM-FBG). Experimental results show stable dual lasing lines with a wavelength separation of ∼0.22 nm and a large
optical signal-to-noise ratio (OSNR) of over 40 dB under room temperature. By applying axial strain to the PM-FBG, the center
wavelengths of the two lasing lines can be tuned over several nanometers and the wavelength separation between the lasing
lines can also be tuned to as small as 0.05 nm, which, to our knowledge, is the smallest wavelength spacing ever obtained
from a stable room-temperature dual-wavelength fiber laser. The proposed laser configuration has the advantages of simple
structure, low loss, stable dual-wavelength operation and a very small lasing linewidth of ∼5 kHz .
PACS 42.55.Wd; 42.81.-i; 42.81.Gs |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|