Intensity Noise Suppression Using Dual-Polarization Dual-Parallel Modulator and Balanced Detector

Optimization of Balanced Detector for Coherent Receiver on Generic InP Platform by Particle Swarm Optimization

“…Rate equations are solved in the active region to get expression for 𝐼 𝐴𝐶 /𝑃 𝑖𝑛 (𝜔). So we get 𝑅(𝜔) as shown in equation (3). Elaborated calculations of 𝑅(𝜔) are described in Appendix A.…”

“…oherent balanced receivers are commonly used in highspeed photonic communication links operating at 1550 nm owing to their ability to suppress laser relative intensity noise (RIN) and to achieve high common mode rejection ratio (CMRR), high noise suppression etc. [1]- [3]. They also enable the differential phase shift keying (DPSK) schemes due to balanced detection, which has nearly 3-dB more sensitivity compared to OOK [4], [5].…”

Microwave Photonic Radars

“…Previously, coherent cancellation is explicitly or implicitly used in many microwave photonic systems, such as highlinearity analog optical links [141]- [145], image-reject mixers [10], [146]- [152], co-site interference cancellation [153]- [159], and frequency multipliers [160]- [162] to suppress the noise, undesirable nonlinear components, interference and image frequencies. For example, a linearized analog optical link with the third-order intermodulation distortion (IMD3) component suppressed by 40 dB was built in [142]; an image-reject mixer with an image-rejection ratio of 25 dB for a 1.2-GHz instantaneous bandwidth linearly frequency-modulated (LFM) signal was realized in [150] (as a comparison, the instantaneous bandwidth of an electrical image-reject mixer is less than 160 MHz [146]); a 30-dB co-site interference cancellation ratio over 9.5 GHz frequency range was obtained in [156] (while for electrical method the maximum reported bandwidth is only 120 MHz [163]); and an optical link with the common-mode noise suppressed by 15 dB over an 18-GHz frequency range was implemented in [164].…”