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We present the results of the photonic integrated circuit measurements in order to implement an optical frequency comb generator (OFCG) based on a recirculating ring using electro-optic phase modulators (EOPM). The design is established on the functional blocks of the OCLARO Tech generic integration platform. The optical comb produces multiple wavelengths, equally spaced by the input RF frequency provided by an external synthesizer from a seed wavelength. This seed can be of external or internal (on-chip) character, by means of a DBR (Distributed Bragg Reflector) single mode laser in order to develop a fully integrated OFCG. This structure is compact and small (6 x 2 mm), whose elements are interconnected with InP waveguides that replaces the optical fiber, avoiding thermal variations that affect the generated signal. For our knowledge, this is the first time that measurements are made on this type of structures. [ABSTRACT FROM AUTHOR]

In this work, we analyze the effect of temperature drifts in a spatial heterodyne Fourier-transform micro-spectrometer fabricated in a Silicon-on-insulator chip. The device comprises an array of 32 Mach-Zehnder interferometers implemented with microphotonic spirals of linearly increasing length. This configuration provides a resolution of 42 pm in a footprint under 12 mm². However, this resolution enhancement implies a greater sensitivity to environmental variations during the spectrometer operation. In this work, the effect of temperature drifts in the spectral retrieval algorithm is studied, and compensation techniques based on multiple calibration matrices is presented. [ABSTRACT FROM AUTHOR]