41 citations · 48 across the 14 of their papers we have counts for
15 papers
Ultra-stable laser with sub-Hz intrinsic linewidth using a silicon photonic chip
Mohamad Hossein Idjadi, Haotian Cheng, Benjia Li +4
Here, we demonstrate a novel optical self-injection-locking scheme integrated with a modulation-free laser frequency stabilization technique co-integrated with a compact vacuum-gap…
Chip-scale modulation-free laser stabilization using vacuum-gap micro-Fabry-Pérot cavity
Mohamad Hossein Idjadi, Haotian Cheng, Farshid Ashtiani +5
Narrow-linewidth lasers are vital for a broad range of scientific and technological applications, including atomic clocks and precision sensing. Achieving high frequency stability…
Integrated photonic deep neural network with end-to-end on-chip backpropagation training
Farshid Ashtiani, Mohamad Hossein Idjadi, Kwangwoong Kim
Integrated photonic neural networks (PNNs) have demonstrated significant potential to complement the digital electronic counterparts [1-3]. Nevertheless, robust and repeatable perf…
Dual-Wavelength -OFDR Using a Hybrid-Integrated Laser Stabilized to an Integrated SiN Coil Resonator
Mohamad Hossein Idjadi, Stefano Grillanda, Nicolas Fontaine +11
We demonstrate dual-wavelength distributed acoustic sensing over 37 km of standard single-mode fiber using -OFDR, utilizing a scalable hybrid-integrated dual-wavelength laser ch…
Modulation-Free Laser Stabilization with Extended Locking Range on a SiN Chip
Mohamad Hossein Idjadi, Farshid Ashtiani, Kwangwoong Kim
We demonstrate a modulation-free laser stabilization system using a cavity-coupled MZI with aided acquisition on a low-loss SiN chip, achieving more than an order-of-magnitude impr…
Hybrid-Integrated Dual-Wavelength Laser Frequency Locked to an Integrated Coil-Resonator for Optical Fiber Sensing
Mohamad Hossein Idjadi, Stefano Grillanda, Nicolas Fontaine +7
We demonstrate dual-frequency stabilization of a hybrid-integrated multi-channel laser to an integrated high Q-factor silicon nitride (SiN) coil resonator with more than 40 dB freq…
Wideband, Efficient AlScN-Si Acousto-Optic Modulator in a Commercially Available Silicon Photonics Process
Mertcan Erdil, Izhar, Yang Deng +5
Acousto-optic integration offers numerous applications including low-loss microwave signal processing, nonreciprocal light propagation, frequency comb generation, and broadband aco…
Dual-Polarization Phase Retrieval Receiver in Silicon Photonics
Brian Stern, Hanzi Huang, Haoshuo Chen +2
We demonstrate a silicon photonic dual-polarization phase retrieval receiver. The receiver recovers phase from intensity-only measurements without a local oscillator or transmitted…
Record Photon Information Efficiency with Optical Clock Transmission and Recovery of 12.5 bits/photon over an Optical Channel with 77 dB Loss
René-Jean Essiambre, Cheng Guo, Sai Kanth Dacha +18
We experimentally demonstrate optical detection at 12.5~bits per incident photon, 9.4~dB higher than the theoretical limit of conventional coherent detection. A single laser transm…
Silicon Photonic Direct-Detection Phase Retrieval Receiver
Brian Stern, Haoshuo Chen, Kwangwoong Kim +3
We demonstrate a direct-detection phase retrieval receiver based on silicon photonics. The receiver implements strong dispersion and delay lines on a compact chip. We retrieve the…
Frequency Tunable Magnetostatic Wave Filters With Zero Static Power Magnetic Biasing Circuitry
Xingyu Du, Mohamad Hossein Idjadi, Yixiao Ding +7
A single tunable filter simplifies complexity, reduces insertion loss, and minimizes size compared to frequency switchable filter banks commonly used for radio frequency (RF) band…
Towards fully integrated photonic backpropagation training and inference using on-chip nonlinear activation and gradient functions
Farshid Ashtiani, Mohamad Hossein Idjadi
Gradient descent-based backpropagation training is widely used in many neural network systems. However, photonic implementation of such method is not straightforward mainly since h…
Modulation-free Laser Stabilization Technique Using Integrated Cavity-Coupled Mach-Zehnder Interferometer
Mohamad Hossein Idjadi, Kwangwoong Kim
Stable narrow-linewidth light sources play a significant role in many precision optical systems. Electro-optic laser frequency stabilization systems, such as the well-known Pound-D…
Enhanced Frequency Noise Discrimination Using Cavity-coupled Mach-Zehnder Interferometer
Mohamad Hossein Idjadi, Andrea Blanco-Redondo
Here, an enhanced frequency noise discriminator is proposed using a cavity-coupled Mach-Zehnder interferometer and demonstrated on a general-purpose programmable integrated photoni…
A surface-normal photodetector as nonlinear activation function in diffractive optical neural networks
Farshid Ashtiani, Mohamad Hossein Idjadi, Ting-Chen Hu +7
Optical neural networks (ONNs) enable high speed parallel and energy efficient processing compared to conventional digital electronic counterparts. However, realizing large scale s…