Mehdi Jamshidifar

Reduction of Four-Wave-Mixing Crosstalk in a Short Fiber-Optical Parametric Amplifier

Four-wave-mixing crosstalk in a fiber-optical parametric amplifier has been reduced by 16 dB by decreasing the fiber length from 340 to 50 m, and increasing the pump power to maintain the gain at 20 dB. In this letter, numerical simulations using the split-step Fourier method are presented, showing consistency with experimental observations.

Fiber Optical Parametric Amplifier Performance in a 1-Tb/s DWDM Communication System

We have reduced signal-signal four-wave mixing crosstalk in a fiber optical parametric amplifier (OPA) by using a short nonlinear fiber for the gain medium and a high-power pump. This allowed us to obtain less than 1 dB penalty for amplification of 26 dense wavelength-division multiplexed (WDM) channels modulated at 43.7 Gb/s return to zero-differential phase-shift keying, with the OPA placed between transmitter and receiver. We then used the same OPA in several different roles for a long-haul transmission system. We did not insert the OPA within the loop, but investigated this role indirectly by using equivalent results for small numbers of loop recirculations. We found that standard erbium-doped fiber amplifiers currently hold an advantage over this OPA, which becomes negligible for long distances. This paper shows that at this time OPAs can handle amplification of WDM traffic in excess of 1 Tb/s with little degradation. It also indicates that with further improvements, fiber OPAs could be a contender for wideband amplification in future optical communication networks.

1-Tb/s DWDM Long-Haul Transmission Employing a Fiber Optical Parametric Amplifier

In this letter, we report the performance of a fiber optical parametric amplifier (OPA) when used as a source or intermediate node amplifier in a dense wavelength-division-multiplexed (DWDM) long-haul transmission testbed with 26 DWDM channels modulated at 43.7-Gb/s return-to-zero differential phase-shift keying. In both scenarios, we demonstrate similar performance to an erbium-doped fiber amplifier. This shows the OPAs compatibility with high-capacity (>1 Tb/s) long-haul communication systems.

Continuous-wave one-pump fiber optical parametric amplifier with 230 nm gain bandwidth

We report operation of a continuous-wave one-pump fiber OPA with net gain between 1460 nm and 1690 nm. We used a 50 m long step-index highly-nonlinear fiber, and 5 W of pump power.

Continuous-wave bismuth-oxide one-pump fiber optical parametric amplifier

We obtained 6 dB gain with a one-pump fiber OPA using a 3-m long Bi-HNLF fiber. Pump power was 30.2 dBm. SBS suppression required 300 MHz PRBS phase modulation.

Continuous-Wave Two-pump Fiber Optical Parametric Amplifier with 60 dB Gain

We have obtained record gain of 60 dB with a continuous-wave two-pump fiber optical parametric amplifier, over a 5.5-nm bandwidth. We used a 500-m long fiber, and 1.5 W of pump power.

1-Tb/s DWDM amplification in a fiber optical parametric amplifier

We report less than 1-dB cross-talk penalty for 26 DWDM channels modulated at 43.7 Gb/s RZ-DPSK when amplified by a fiber optical parametric amplifier showing compatibility with high-capacity (> 1 Tb/s) communication systems.

Continuous-wave amplification in bismuth-oxide fiber optical parametric amplifiers

We review our investigations on bismuth-oxide fiber as an amplifying medium for parametric amplifiers with continuous-wave pumping. The results lead to new applications in demultiplexing, which are discussed.

Fiber optical parametric amplifier in high-speed WDM networks

We report high-capacity (> 1 Tb/s) amplification by a fiber optical parametric amplifier in different roles displaying compatibility and versatility in future WDM networks with phase-shift keying modulation format.

Wavelength demultiplexer based on a continuous-wave bismuth-oxide fiber optical parametric amplifier

We used the sub-nanometer bandwidth of a bismuth-oxide fiber OPA for demultiplexing 10 Gb/s channels 100 GHz apart with penalty <2 dB. We obtained -20 dB of crosstalk, with 2.5 W of CW pump power.