Wavelength-tunable single longitudinal mode fiber optical parametric oscillator

• Main Authors: Lim, L. T., Bakar, M. H. Abu, Mahdi, M. A.
• Format: Article
• Language: English
• Published: Optical Society of America 2017
• Online Access: http://psasir.upm.edu.my/id/eprint/63705/1/Wavelength-tunable%20single%20longitudinal%20mode.pdf; http://psasir.upm.edu.my/id/eprint/63705/

We demonstrate a ring cavity single longitudinal mode fiber optical parametric oscillator using a passive sub-ring cavity and an unpumped erbium doped fiber configured with an external fiber mirror for single mode selection. The unpumped erbium doped fiber uses its saturable absorption characteristic to generate a self-induced narrowband filter when two counter-propagating waves interfere inside the fiber. A single longitudinal mode laser is obtained with a linewidth of 17.35 kHz at a pump power of 31.2 dBm. A 3.8 nm tuning range from 1536.5 nm to 1540.3 nm is achieved with a signal-to-noise ratio of about 60 dB. The power stability of the single longitudinal mode laser is 2.07 dB over a period of 30 minutes.