All-Fiber Optical Parametric Oscillator (FOPO) Chengao Wang

Review of OPO

Four wave mixing (FWM)  General FWM  Parametric Amplification in FWM

Degenerated FWM   i = 2  p －  s

Phase matching condition  For intense pump:

phase matching near the zero dispersion wavelength At the zero dispersion wavelength, Expand near

Advantage of FOPO  tunable alternative to solid-state lasers  compact  virtually alignment free

Limitations  Nonlinearity of conventional fibers are very low.  Pump power is not sufficient high to provide gain Parametric gain coefficient under phase matching condition

Recent Development Last year, a team has demonstrated the first continuous wave FOPO using a holey fiber. The oscillator they made operates at 1550nm and can yield an oscillation parametric signal that consists of a single line with a 30 dB extinction ratio

Three key elements of the design  the use of a high power CW(3.5 W) pump  refinement of their fiber splicing technique (the lowest splice loss was 0.42 dB)  state-of-the-art micro-structured fiber

Thanks

Frequency component generated by FWM

Coupled amplitude equations Linear phase mismatch