SiN Integrated Photonics for near-infrared LIDAR
Nicola A. TylerDaivid FowlerStéphane MalhouitreS. BrisionOlivier LemonnierWilfried RabaudBertrand Szelag
3
Citation
7
Reference
20
Related Paper
Citation Trend
Abstract:
We present a SiN photonic platform for applications in the 800-1000 nm wavelength range. We demonstrate low-loss waveguides, splitters, grating couplers and phase-shifters. We report on the use of integrated SiN circuits for LIDAR applications and show beam steering over 17.7° using a SiN integrated optical phased array.Keywords:
Beam steering
Phased-array optics
Beam splitter
We report on the design, fabrication and characterisation of submicron silicon-on-insulator strip waveguides at a 3.74 μm wavelength. Experimental results for 1×2 multi-mode interference splitters are also given.
Integrated Optics
Cite
Citations (1)
Planar photonic integrated circuits based on VCSEL are achieved by embedding an optical waveguide within the resonance cavity of the VCSEL, and utilizing diffraction grating couplers to efficiently diffract light from the VCSEL cavity into the waveguide in each lateral direction.
Vertical-cavity surface-emitting laser
Waveguide
Cite
Citations (0)
Here, we demonstrate the fabrication of Silicon Nitride photonic platform for visible wavelength (~640 nm). The optimized passive SiN platform could be interesting for integrated 2D materials based photonic devices exploiting sharp exciton resonance.
Cite
Citations (2)
We review our recent work on waveguide grating couplers, including an apodized grating coupler with engineered coupling strength to achieve Gaussian-like output profile, which greatly improves the fiber-chip coupling efficiency. We will also discuss a new class of grating couplers involving the use of sub-wavelength nanostructures to engineer the optical properties. Effective medium theory can be used in the design of sub-wavelength structures, which, when properly engineered, can offer broadband coupling and polarization independence. Other applications of waveguide gratings, for example bi-wavelength two dimensional gratings coupler for (de-)multiplexing two different wavelengths, fiber-waveguide hybrid lasers and mid-infrared grating couplers on silicon-on-sapphire wafer will also be briefly discussed.
Waveguide
Cite
Citations (9)
We demonstrate a low back reflection grating coupler on a SOI CMOS-compatible process designed for vertical integration of on-chip laser sources. It showed <-26dB back reflection and 1.9dB coupling loss to a 4-μm-diameter laser mode.
Reflection
Cite
Citations (5)
Germanium-on-silicon is a highly promising platform for planar photonics for the midinfrared, due to germanium's wide transparency range. In this letter, we report Ge-on-Si waveguides with record low losses of only 0.6 dB/cm, which is achieved using a 2.9-μm thick germanium layer, thus minimizing mode interaction with dislocations at the germanium/silicon interface. Using these waveguides, multimode interferometers with insertion losses of only 0.21 ± 0.02 dB are also demonstrated.
Waveguide
Cite
Citations (100)
We determine the propagation loss for E-Beam Lithography fabricated sub-wavelength grating (SWG) waveguides at 1550 nm for various duty cycles.
Duty cycle
Cite
Citations (3)
We report on Luxtera's technology platform, focusing on photonic device library development. As examples, we present approaches to design low-loss polarization-splitting grating couplers, high-speed phase modulators and photodetectors.
Transceiver
Cite
Citations (10)
As most integrated optics platforms, silicon offers only a fixed set of material refractive indices for designing devices. The ability of sub-wavelength patterned structures to synthesize arbitrary equivalent index values between nSi ~ 3.5 and nair=1 has thus enabled completely new design approaches that have led to silicon waveguide devices with breakthrough performance. This review covers the latest advances in sub-wavelength structured fiber-to-chip grating couplers and multimode interference couplers. We discuss, among others, single-etch grating couplers with high coupling efficiency ( -1.8 dB), and broad bandwidth ( 115 nm at 3 dB), as well as ultra-short, high performance multi-mode interference couplers. We furthermore introduce the concept of dispersion engineering with sub-wavelength structures, showing its potential to increase the bandwidth of waveguide devices, including multi-mode interference couplers covering a 450 nm wavelength span.
Waveguide
Cite
Citations (88)
We propose and design a dual-layer grating coupler for dual-wavelength-band multiplexing on multilayer SiN-on-SOI photonic integrated platform. Its peak coupling efficiencies are -2.95 dB for O-band and -2.49 dB for C-band.
Multi-band device
Cite
Citations (5)