Within the Interreg North-West Europe project OIP4NWE, we have set up an open innovation next-generation pilot line for InP-based photonic integrated circuits (PICs) to improve PIC manufacturing and make packaging more reliable and affordable. We present the service offering within the different components of the pilot line, consisting of InP PIC manufacturing in the front-end, and external interfacing optics and packaging in the back-end. We also report on how we supported 6 European SMEs with an innovation support voucher with the OIP4NWE pilot line.
We demonstrate a monostatic LiDAR based on an InP photonic integrated optical phased array (OPA). The system utilizes an OPA with on-chip amplification which transmits and receives light simultaneously through an array of eight end-fire waveguide antennas. The OPA is capable of a 4.6° angular resolution and a 41° field of view. The on-chip amplifiers provide up to 21.5dB gain in a 1465-1600nm wavelength range. We show proof-of-principle FMCW (frequency modulated continuous wave) sensing through the monostatic OPA. The system relies on the frequency modulation with up to 10GHz frequency excursion of an external optically isolated DFB laser, which allows the simultaneous detection of range and velocity. The measurements were performed with a reflective target located ~2m away from the OPA, by varying the target position and velocity of 30 cm and ±5cm/s respectively. To the best of our knowledge, we demonstrated the first monostatic FMCW LiDAR implementation on an integrated InP OPA.
Nanolasers and nanoLEDs are seen as potential sources for low-power optical interconnects. The enhancement of the spontanous emission rate (Purcell effect) related to the small volume has been perceived as a key aspect in the operation of these devices. The fundamental aspects of size scaling in practical nanolasers and nanoLEDs will be discussed in this talk. Firstly, experimental results on nanoLEDs coupled to waveguides on Si will be presented. The effect of surface recombination will be discussed, together with promising passivation methods. In the second part of the talk, a simple theoretical model based on rate equations will be used to investigate the ultimate limits to scaling. In this model, spontaneous and stimulated emission are treated on the same footing, leading to a consistent treatment of the rate enhancement due to the decreasing volume. The analysis shows that Purcell enhancement of spontaneous emission plays a limited role in practical structures, due to the unavoidable linewidth broadening, while the related volume dependence of the stimulated emission rate has a key impact on nanolaser dynamics.
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