We demonstrate first-order quasi-phase-matched backward second-harmonic generation
(BSHG) with an efficiency of 18.7%. This represents an increase by two orders of magnitude …

We experimentally demonstrate tunable modulation format conversion of quadrature phase
shift keying (QPSK) to four-level pulse amplitude modulation (PAM4) using nonlinear wave …

We demonstrate an all-optical phase noise mitigation scheme based on the generation,
delay, and coherent summation of higher order signal harmonics. The signal, its third-order …

All-optical phase regeneration of a binary phase-shift keying signal is demonstrated at 10–
30 Gb/s without a phase-locked loop in a phase-sensitive amplification-based system using …

We propose a scheme for phase regeneration of optical binary phase-shift keying (BPSK)
data signals based on phase sensitive amplification without active phase locking. A delay …

摘要基于高阶**交幅度调制(QAM) 和大线宽相干光**交频分复用(COGOFDM) 系统,
提出了一种在时域进行无迹卡尔曼滤波(UKF) 的相位噪声补偿算法. 该算法在接收端基于训练 …

Homodyne detection is of significant interest in optical communications because it detects
both the amplitude and phase information of the incoming data channel. One of the …

This Letter proposes a method for tunable automatically locked homodyne detection of
wavelength-division multiplexing (WDM) dual-polarization (DP) phase-shift keyed (PSK) …

Optical nonlinearities in various materials pose some of the biggest challenges and
opportunities in optical communications. Many important functions can be implemented …

This study examines the capability to significantly suppress the frequency noise of a
semiconductor distributed feedback diode laser using a universally applicable approach: a …