Ultra-Wide Range Wavelength Conversion Using FWM in a Raman DFB Fiber Laser

Abstract

We demonstrate for the first time to our knowledge, four-wave-mixing (FWM) in a 30cm-long center π phase-shifted Raman distributed-feedback (DFB) fiber laser. The FWMto-signal conversion efficiency is -24dB and the wavelength conversion range is 94.1nm.

Ultra-Broadband Wavelength Conversion Based on Four-Wave Mixing in a Raman DFB Fiber Laser

“…2(a) shows the typical FWM output spectra with the TLS from the R-DFB device with a resolution bandwidth (RBW) of 1nm. Note that the R-DFB signal at ~1117.8 nm was generated with the CW pump source at 1064 nm (#0) and then acted as the pump source for FWM process in the R-DFB device [6]. Also, the CW 1064 nm pump source was maintained constantly at ~2 W [6] throughout the measurements of continuously tuning the TLS from ~1080.4 nm (#1) to ~1040.8 nm (#5).…”

“…Note that the R-DFB signal at ~1117.8 nm was generated with the CW pump source at 1064 nm (#0) and then acted as the pump source for FWM process in the R-DFB device [6]. Also, the CW 1064 nm pump source was maintained constantly at ~2 W [6] throughout the measurements of continuously tuning the TLS from ~1080.4 nm (#1) to ~1040.8 nm (#5). Such a CW 1064nm pump power was selected by means of ensuring the highest possible conversion efficiency of the conjugate wave #0* to its original wave #0 without the TLS.…”