W. Shieh et al., ALL-OPTICAL WAVELENGTH SHIFTING OF MICROWAVE SUBCARRIERS BY USING 4-WAVE-MIXING IN A SEMICONDUCTOR OPTICAL AMPLIFIER, IEEE photonics technology letters, 8(4), 1996, pp. 524-526
We demonstrate all-optical wavelength shifting over 9 nn for two micro
wave subcarriers by using four-wave mixing in a semiconductor optical
amplifier. In our experiment, the RF spectrum is relatively unaffected
by wavelength shifting and the resultant system power penalty is simi
lar to 0.5 dB. Such a transparent wavelength shifter may be a critical
component in WDM networks supporting both subcarrier multiplexed (SCM
) and high speed digital transmission.