LioniX International and the University of Twente will participate at ECOC 2021 presenting the publication "Programmable Integrated Microwave Photonic Filter using a Modulation Transformer and a Double-Injection Ring Resonator". More specifically, Okky Daulay, Gaojian Liu, Roel Botter and David Marpaung from the University of Twente, together with Marcel Hoekman, Edwin Klein and Chris Roeloffzen from LioniX International and Jose Capmany from Universitat Politècnica de València will demonstrate a new kind of integrated Si3N4 microwave photonic (MWP) signal processor that combines a programmable modulation transformer (MT) with a versatile double-injection ring resonator (DI-RR). With this circuit, we show an array of MWP filtering functions unmatched by traditional MWP circuits.

📅 Wednesday 15 September    🕒 09:15 - 09:30     📍 Room B

➡️ Read more at https://bit.ly/3hqFSWs

12 September 2021

391

Second harmonic generation is an efficient way to create coherent radiation at wavelengths that are not accessible with standard laser sources. In this work the authors demonstrate second harmonic generation from 1550 to 775 nm in a polymer photonic integrated circuit via the hybrid integration of a periodically poled lithium niobate crystal. The bulk crystal is inserted in an on-chip free-space section between two waveguide coupled GRIN lenses. Fiber to fiber conversion efficiencies were 0.03%/W for a continu-ous wave laser source and 100%/W for a femtosecond laser source. Furthermore, third and fourth harmonic light at 517 and 388 nm was observed.

Read full article here.

09 July 2021

509

Chip-sized diode lasers with ultra-narrow spectral linewidth are of high interest for many applications, e.g. for phase encoding in optical communications and precision metrology. Recently, a record-narrow intrinsic linewidth of 290 Hz was achieved with hybrid integration of an InP semiconductor optical amplifier (SOA) and a low-loss dielectric waveguide feedback circuit with a Vernier spectrally selective feedback filter that significantly extends the on-chip cavity length. However, increasing the cavity length also reduces the cavity mode spacing, which causes undesired instabilities in the form of mode hops and power fluctuations when tuning the laser wavelength.

Read full publication at: https://bit.ly/3jvgErB

01 July 2021

472

Hybrid integrated semiconductor laser sources offering extremely narrow spectral linewidth, as well as compatibility for embedding into integrated photonic circuits, are of high importance for a wide range of applications. We present an overview on our recently developed hybrid-integrated diode lasers with feedback from low-loss silicon nitride (Si N in SiO ) circuits, to provide sub-100-Hz-level intrinsic linewidths, up to 120 nm spectral coverage around a 1.55 m wavelength, and an output power above 100 mW. We show dual-wavelength operation, dual-gain operation, laser frequency comb generation, and present work towards realizing a visible-light hybrid integrated diode laser.

Read full publication at https://bit.ly/3w1OIOD

29 June 2021

486