Aleksandr Biberman

Automated wavelength recovery for microring resonators

We lock an adiabatic microring resonator to a laser line with a lock-in time of 200μs using a digital control loop, thereby experimentally demonstrating the first automated and scalable wavelength recovery approach for microring resonators.

Adiabatic resonant microring (ARM) modulator

A high-speed adiabatic resonant microring silicon modulator, which simultaneously enables interior electrical contacts, 4-μm diameter, and 6.9-THz free spectral range, is demonstrated with open eye diagrams up to 12Gb/s, and extinction ratios up to 7.3dB.

Adiabatic microring modulators

In this work, we demonstrate and experimentally characterize adiabatic microring modulators, the smallest (4-μm-diameter) microring modulators shown to date, yielding 6.92-THz uncorrupted free spectral ranges. We demonstrate and quantify operation up to 12.5-Gb/s data rates.

Ultralow-loss silicon ring resonators

We experimentally demonstrate silicon ring resonators with internal quality factors of Q 0 =2.2×107, corresponding to record 2.7-dB/m losses. We show that the losses are bend-loss-limited, indicating that the loss limit for silicon has not been reached.

Ultralow Power Silicon Modulators

We discuss recent results in low-energy (0.9fJ/bit) high-speed (25Gb/s) electro-optically stabilized microdisk modulators. The combined results of highly efficient modulation and electro-optic thermal compensation represent a major step towards single-digit femtojoule-class communications.