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Anat Siddharth

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Related publications (44)

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A Nitride Ring Isolator

Tobias Kippenberg, Junqiu Liu, Anat Siddharth, Joseph Connor Skehan

A silicon nitride optical ring isolator is realized by spatiotemporal modulation using bulk acoustic wave stress-optical transducers. By driving three actuators with fixed relative phases, over 17 dB isolation is achieved. (C) 2020 The Author(s) ...

IEEE2020

Wafer-scale fabrication of ultralow-loss silicon nitride nonlinear photonic circuits

Rui Ning Wang, Tobias Kippenberg, Maxim Karpov, Junqiu Liu, Miles Henry Anderson, Arslan Sajid Raja, Nils Johan Engelsen, Wenle Weng, Anton Lukashchuk, Guanhao Huang, Jijun He, Mikhail Churaev, Anat Siddharth, Alexey Tikan

Recent advances in silicon nitride integrated photonics have achieved ultralow optical losses. Transferring this technology to standard commercial foundries, and merging it with silicon photonics via heterogeneous integration, will seed novel laser and qua ...

IEEE2020

Bidirectional microwave-optical transduction based on integration of high-overtone bulk acoustic resonators and photonic circuits

Rui Ning Wang, Tobias Kippenberg, Anat Siddharth, Terence Albert Emile Blésin, Wil Kao

Coherent interconversion between microwave and optical frequencies can serve as both classical and quantum interfaces for computing, communication, and sensing. Here, we present a compact microwave-optical transducer based on monolithic integration of piez ...

Nature Research2024

Hertz-linewidth, high-power, frequency-agile photonic integrated E-DBR laser

Tobias Kippenberg, Johann Emmeram Riemensberger, Anat Siddharth, Zheru Qiu

We demonstrate hybrid integration of an RSOA with an extended-distributed Bragg reflector (E-DBR) laser cavity implemented on a Si3N4 chip with monolithically integrated piezoactuators. The laser exhibits intrinsic linewidth of 4 Hz with laser frequency tu ...

Optical Society of America2024

Ultrafast Tunable Photonic Integrated Extended-DBR Pockels Laser

Tobias Kippenberg, Andrey Voloshin, Anat Siddharth, Zheru Qiu, Simone Bianconi

Hybrid photonic integrated lasers have revolutionized laser technology by combining the scalable manufacturing of simple laser diodes with high-performance features such as frequency stability, opticallinewidth, and tuning linearity [1], traditionally only ...

IEEE2025

Ultrafast tunable photonic-integrated extended-DBR Pockels laser

Tobias Kippenberg, Andrey Voloshin, Anat Siddharth, Zheru Qiu, Simone Bianconi

Frequency-agile lasers that can simultaneously feature low noise characteristics and fast mode-hop-free frequency tuning are keystone components for applications ranging from LiDAR and distributed sensing to communication and quantum information processing ...

Nature Publishing Group2025

Ultrafast Pockels-tunable hybrid integrated E-DBR laser

Tobias Kippenberg, Johann Emmeram Riemensberger, Anat Siddharth, Zheru Qiu, Simone Bianconi

We demonstrate a hybrid integrated frequency-agile laser based on an InP gain chip and an extended electro-optic Bragg waveguide reflector manufactured with a wafer-scale lithium niobate-on-insulator process featuring 10 GHz tuning range with high optical ...

Institute of Electrical and Electronics Engineers Inc.2024

X-Band Aom On Chip

Tobias Kippenberg, Junqiu Liu, Anat Siddharth, Terence Albert Emile Blésin

Silicon Nitride integrated photonic circuits have drawn much attention owing to its ultra-low loss and large Kerr nonlinearity. However, the lack of Pockels effect makes it difficult to be modulated clectro-optically, which posts a major challenge for the ...

IEEE2021

Frequency-agile Hybrid Integrated Laser at Sub-micron Spectral Range for Coherent Sensing and Quantum Applications

Rui Ning Wang, Tobias Kippenberg, Anat Siddharth

We demonstrate a hybrid integrated low-noise laser based on a 900 nm laser diode self-injection locked to a microresonator with MEMS actuators exhibiting a frequency actuation bandwidth >10 MHz and a tuning efficiency >30 MHz/V. ...

Institute of Electrical and Electronics Engineers Inc.2024

Full C-band tunable integrated Erbium lasers via wafer-scale fabrication

Rui Ning Wang, Tobias Kippenberg, Xinru Ji, Anat Siddharth, Zheru Qiu

We demonstrate an integrated Erbium-based tunable laser using wafer-scale fabrication and ion implantation of silicon nitride photonic integrated circuits, and achieve single-frequency lasing tunable from 1530 nm to 1575 nm covering the entire optical C-ba ...

Institute of Electrical and Electronics Engineers Inc.2024

Lithium-niobate-based narrow-linewidth frequency agile integrated lasers with petahertz frequency tuning rate

Rui Ning Wang, Tobias Kippenberg, Johann Emmeram Riemensberger, Junqiu Liu, Guanhao Huang, Mikhail Churaev, Anat Siddharth, Viacheslav Snigirev

We demonstrate an electro-optically tunable hybrid integrated laser self-injection locked to a mode of a heterogeneously integrated lithium-niobate-on-Damascene-silicon-nitride microresonator. An intrinsic linewidth of 3 kHz and a frequency tuning rate of ...

IEEE2023

High-density lithium niobate integrated photonics

Tobias Kippenberg, Johann Emmeram Riemensberger, Mikhail Churaev, Anat Siddharth, Zihan Li

We demonstrate a strip waveguide-based LiNbO3 photonic integrated circuit fabricated with a novel hard mask, diamond-like-carbon (DLC). The steep sidewall configuration exhibits tight optical confinement and dispersion control while preserving ultra-low lo ...

Optical Society of America2023

Single-frequency violet and blue laser emission from AlGaInN photonic integrated circuit chips

Tobias Kippenberg, Anat Siddharth

Chip-based, single-frequency and low phase-noise integrated photonic laser diodes emitting in the violet (412 nm) and blue (461 nm) regime are demonstrated. The GaN-based edge-emitting laser diodes were coupled to high-quality on-chip micro-resonators for ...

Optica Publishing Group2023

Ultrafast Tunable Photonic Integrated E-DBR Pockels Laser

Tobias Kippenberg, Johann Emmeram Riemensberger, Anat Siddharth, Zheru Qiu, Simone Bianconi

The hybrid integration of III-V gain media with low-loss photonic integrated circuits has advanced the performance of laser systems in terms of laser stability and coherence. The advent of lithium niobate on insulator (LNOI) photonics for self-injection lo ...

Springer Science and Business Media Deutschland GmbH2024

Sub-kHz linewidth, high power, frequency agile photonic integrated E-DBR laser

Rui Ning Wang, Tobias Kippenberg, Johann Emmeram Riemensberger, Xinru Ji, Anat Siddharth, Zheru Qiu

We demonstrate a novel class of lasers, based on the hybrid integration of an RSOA with an extended-distributed Bragg reflector (E-DBR) laser cavity implemented on a Si3N4 chip with microheaters. This enables us to reach sub-kHz laser linewidth with more t ...

Optical Society of America2023

Tunable optical reflector chip for external cavity laser

Tobias Kippenberg, Johann Emmeram Riemensberger, Anat Siddharth

An optical reflector chip (10) comprising a waveguide arrangement (11) configured to guide optical radiation and a modulation device (3). The waveguide arrangement (11) comprises a Bragg grating section (111), the Bragg grating section (111) comprising a p ...

2024

A High-Resolution Photonic Integrated High Q Microresonator Based Accelerometer

Tobias Kippenberg, Junqiu Liu, Arslan Sajid Raja, Anat Siddharth

We demonstrated a packaged optomechanical accelerometer with resolution of 850ng. The resonance of a 4 million Q Si3N4 microring resonator is modulated by the stress in springs of a released milligram proof mass upon acceleration. ...

Optical Society of America2023

Stabilization of SiN Kerr Solitons for the calibration of astronomical spectrographs

Rui Ning Wang, Tobias Kippenberg, Miles Henry Anderson, Xinru Ji, Anat Siddharth

We demonstrate a stabilization scheme for dissipative Kerr solitons in SiN-resonators achieving high comb stability and long-term operation. Measuring 10Hz level absolute Kerr comb line stability (at 1 second) close to the pump, resulting in kHz level stab ...

Optical Society of America2023

Microwave-Optical Transduction Using High-Overtone Bulk Acoustic Resonators on Silicon Nitride Photonics

Tobias Kippenberg, Anat Siddharth, Terence Albert Emile Blésin, Wil Kao

We present compact microwave-optical transducers between the microwave S-band and optical C-band based on monolithic integration of piezoelectric actuators atop silicon nitride photonic circuits. The silica cladding of the optical waveguide core is suspend ...

Springer Science and Business Media Deutschland GmbH2024

Frequency agile photonic integrated external cavity laser

Rui Ning Wang, Tobias Kippenberg, Johann Emmeram Riemensberger, Diego Aldo Julius Visani, Andrey Voloshin, Anat Siddharth, Viacheslav Snigirev, Andrea Bancora, Vladimir Shadymov

We demonstrate a Vernier ring laser with linear frequency tuning of 1.5 GHz at 100 kHz chirp rate and wavelength switching with 7 ns rise time and 75 nW power consumption using Si3N4 photonic chip with integrated PZT actuators. ...

Optical Society of America2023