An ASIC Control Circuit for Thermal Actuated Large Optical Packet Switch Array

摘要

In this article we propose the employment of an ASIC integrated control circuit to compensate the fabrication error and tuning the wavelength response in a thermally actuated ring type optical switch. Additional functionalities can also be added in this circuit by tailoring externally the roundtrip loss or coupling constants of the ring. The design concept can be easily scaled up for large array format optical switch system without much change in the terminal numbers thanks to the three dimensional hierarchy of control circuit design, which effectively reduces the terminal numbers into the cubic root of the total control unit numbers. The integrated circuit has been designed, simulated, as well as fabricated, and demonstrated a decent performance with Free Spectral Range (FSR) equal to 1.5 nm at a wavelength of 1534 nm and center wavelength shift of the ring up to 0.3 nm for thermal actuated ring type optical switch.