利用非线性双折射AlGaAs波导通过偏振不敏感交叉相位调制实现将归零开关键控（RZ - OOK）和归零二进制相移键控（RZ - BPSK）全光幅度 - 相位复用为归零四相相移键控（RZ - QPSK）。

All-optical amplitude-phase transmultiplexing of RZ-OOK and RZ-BPSK to RZ-QPSK by polarization-insensitive XPM using a nonlinear birefringent AlGaAs waveguide.

作者信息

Cannon B M, Mahmood T, Astar W, Apiratikul P, Porkolab G, Boudra P, Mohsenin T, Richardson C J K, Carter G M

出版信息

Opt Express. 2013 Aug 26;21(17):19885-99. doi: 10.1364/OE.21.019885.

DOI:10.1364/OE.21.019885

Abstract

Polarization-insensitive (PI) phase-transmultiplexing (PTM) of a 10-Gb/s return-to-zero ON-OFF keying (RZ-OOK) pump and a 10-Gb/s RZbinary phase-shift keying (RZ-BPSK) probe to 20-Gb/s RZ-quadrature-PSK (RZ-QPSK) has been successfully demonstrated for the first time in a passive, birefringent AlGaAs waveguide, utilizing PI cross-phase modulation (PI-XPM). For differential QPSK (DQPSK)-detection, a 10 − 9-BER pre-amplified receiver sensitivity penalty of ≈ 2.5 dB for the in-phase component and ≈ 4.9 dB for the quadrature component were found. The penalties were relative to the FPGA-precoded RZ-DQPSK baseline for a pump-probe detuning of ≈ 12 nm, when the probe state of polarization was scrambled and the pump was launched off-axis into the waveguide.

摘要

在无源双折射AlGaAs波导中，首次利用偏振不敏感（PI）交叉相位调制（PI-XPM）成功演示了将10Gb/s归零开关键控（RZ-OOK）泵浦和10Gb/s RZ二进制相移键控（RZ-BPSK）探测偏振不敏感（PI）相位传输复用（PTM）到20Gb/s RZ正交相移键控（RZ-QPSK）。对于差分QPSK（DQPSK）检测，当探测偏振态被扰乱且泵浦以离轴方式注入波导时，对于同相分量，发现误码率（BER）为10⁻⁹时预放大接收机灵敏度损失约2.5dB，对于正交分量约为4.9dB。这些损失是相对于泵浦-探测失谐约12nm时的现场可编程门阵列（FPGA）预编码RZ-DQPSK基线而言的。