All-optical NRZ-to-RZ format conversion at 10 Gbit/s with 1-to-4 wavelength multicasting exploiting cross-phase modulation & four-wave-mixing in single dispersion-flattened highly nonlinear photonic crystal fiber

Abstract

All-optical NRZ-to-RZ format conversion with a function of wavelength multicasting is proposed in this paper, which is realized by exploiting cross-phase modulation (XPM) and Four-Wave-Mixing (FWM) in a dispersion-flattened highly nonlinear photonic crystal fiber (DF-HNL-PCF). The designed format converter is experimentally demonstrated, for which the 1-to-4 wavelength multicasting is achieved simultaneously by filtering out two FWM idler waves and both blue-chirped and red-chirped components of the broadened NRZ spectrum induced by XPM. Moreover, the wavelength tunability and dynamic characteristics of the proposed NRZto-RZ format converter are also exploited using the different central wavelengths of an optical clock signal and varying the input optical power at a DF-HNL-PCF in our experiment. It is shown that the designed format converter can possess a wide range of operational wavelength over 17 nm, an optimal extinction ratio of 11.6 dB and a Q-factor of 7.1, respectively. Since the proposed scheme uses an optical-fiber-based configuration and is easy for implementation, it can be very useful for future applications in advanced fiber-optic communication networks.

Optical Channel Capacity Upgrade Based on Multiwavelength Conversion XGM Using Semiconductor Optical Amplifier for Access Networks

“…SOA that works in the saturation region increases the effect of nonlinear behaviors such as cross-gain modulation (XGM), cross-phase modulation (XPM), and four-wave mixing (FWM) [16][17][18][19][20]. There are many parameters which guided the output characteristics of SOA under this situation; the pump power played as the key factor that controlled the behavior of SOA outputs responses.…”

All-Optical Bit-Rate Flexible NRZ-to-RZ Conversion Using an SOA-Loop Mirror and a CW Holding Beam

“…An appreciable number of all-optical data-format conversions have been reported, including semiconductor optical amplifier (SOA) gain compression [1,2], a monolithically integrated Michelson interferometer (MI) employing SOAs [3], an SOA/fiber grating wavelength converter [4], a nonlinear optical loop mirror (NOLM) with SOA [5][6][7]15], cross-phase modulation (XPM) and/or four-wave-mixing (FWM) in a nonlinear photonic crystal fiber [8] or a Mach-Zehnder interferometer (MZI) employing SOAs [9], and a FabryPerot (FP) laser diode with dual-wavelength injection locking [10,17]. Currently, research has been extended to all-optical format conversions between on-off keying (OOK) and phase-shift keying (PSK) [11,12].…”