OTDM to WDM format conversion based on quadratic cascading in a periodically poled lithium niobate waveguide
Journal:
Optics Express
Issue Date:
2010
Abstract(summary):
We propose and demonstrate error-free conversion of a 40 Gbit/s optical time division multiplexed signal to 4 times 10 Gbit/s wavelength division multiplexed channels based on cascaded second harmonic and difference frequency generation in a periodically poled lithium niobate waveguide. The technique relies on the generation of spectrally (and temporally) flat linearly chirped pulses which are then optically switched with short data pulses in the nonlinear waveguide. Error-free operation was obtained for all channels with a power penalty below 2 dB.