On-Chip OSNR Monitoring With Silicon Photonics Transparent Detector

Abstract

Abstract-Non-invasive integrated detectors, named ContactLess Integrated Photonic Probe (CLIPP), are employed to demonstrate on-chip noise-independent power monitoring of optical channels and in-band Optical Signal to Noise Ratio (OSNR) measurement. The proposed technique is based on a two step lock-in demodulation of optical signals that are suitably labeled with low-modulation-index labels. We demonstrate OSNR measurement from 8 up to 27 dB/0.1 nm on 10 Gbps on-off keying (OOK) signals with a power level ranging from -25 up to -15 dBm. This approach provides a promising tool for the monitoring of channels in reconfigurable optical networks with flexible channel allocation strategy, where the small channel separation makes the measurement of the in band OSNR challenging.

Automatic Tuning of Silicon Photonics Microring Filter Array for Hitless Reconfigurable Add–Drop

“…To measure the power of the Add signal, regardless of the presence of the dropped signal, the channel labeling technique presented in section II-D and with more details in [17] and [19], is used. The Add signal label is inserted by a thermally driven MZI at the Add port as shown in Fig.…”