Chemically etched ultrahigh-Q wedge-resonator on a silicon chip

Lee, Hansuek; Chen, Tong; Li, Jiang; Yang, Ki Youl; Jeon, Seok-Gy; Painter, Oskar; Vahala, Kerry J.

doi:10.1038/nphoton.2012.109

Cited by 610 publications

(562 citation statements)

References 37 publications

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“…An ultra-high-Q planar silica-on-silicon disk resonator 15 is used for cascaded Brillouin oscillation and microwave generation. Microcavity-based Brillouin lasers have only recently been demonstrated [41][42][43] .…”

Section: Resultsmentioning

confidence: 99%

“…Microcavity-based Brillouin lasers have only recently been demonstrated [41][42][43] . The present devices are silicon-chip based and they feature very high coherence and high quantum efficiency 15,44 . Both high-power and low-phase-noise microwave generation from the disk resonator are achieved by cascaded stimulated Brillouin lasing and subsequent photomixing of pairs of Brillouin laser as illustrated in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…1b) through a taper fibre technique 45 . The size of the disk resonator (B6 mm) is carefully designed such that the free spectral range of the cavity matches the Brillouin gain shift 15,44 . Once the coupled pump power reaches the stimulated Brillouin threshold, the firstorder Stokes wave is excited in the backward direction and is routed through a fibre circulator to an optical spectral analyser, a monitor photodetector (bandwidth 125 MHz) and a fast photodetector (bandwidth 50 GHz).…”

Section: Resultsmentioning

confidence: 99%

“…These highperformance optoelectronic oscillators represented a paradigm shift in the generation of microwaves and were followed by optical resonator-based versions that employed an optical microcavity to achieve the requisite oscillator storage time 8,9 . Generally, the ability to achieve long storage times in compact, high-Q resonators has experienced a major leap forward during this same period [10][11][12][13][14][15] .…”

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Microwave synthesizer using an on-chip Brillouin oscillator

2013

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Low-phase-noise microwave oscillators are important to a wide range of subjects, including communications, radar and metrology. Photonic-based microwave-wave sources now provide record, close-to-carrier phase-noise performance, and compact sources using microcavities are available commercially. Photonics-based solutions address a challenging scaling problem in electronics, increasing attenuation with frequency. A second scaling challenge, however, is to maintain low phase noise in reduced form factor and even integrated systems. On this second front, there has been remarkable progress in the area of microcavity devices with large storage time (high optical quality factor). Here we report generation of highly coherent microwaves using a chip-based device that derives stability from high optical quality factor. The device has a record low electronic white-phase-noise floor for a microcavity-based oscillator and is used as the optical, voltage-controlled oscillator in the first demonstration of a photonic-based, microwave frequency synthesizer. The synthesizer performance is comparable to mid-range commercial devices.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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confidence: 99%

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Microwave synthesizer using an on-chip Brillouin oscillator

2013

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“…Unlike micro-cavities formed by surface reflow [166], for the disk geometry employed in this thesis (see fig. 2.6c), surface scattering is known to play an important role in limiting the optical-Q [178]. A simple model suggests that [179] …”

Section: Modulation Spectroscopymentioning

confidence: 99%

Quantum Limits on Measurement and Control of a Mechanical Oscillator

Sudhir

2018

Springer Theses

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PAR Vivishek SUDHIR JOSEPH CONRAD, Heart of DarknessExperimental physics demands a certain degree of manual dexterity, the patience to tolerate the mundane, and an inexhaustible supply of optimism. Tobias hired me to work on an immensely sophisticated experiment despite any proof of my possessing these qualities; I am indebted to him for the belief he has placed in me. I would also like to acknowledge his dedication to fostering an environment where the pursuit of science is unencumbered by other worldly concerns. Stefan, Ewold and Samuel bore the brunt of a theorist trying to perform delicate experiments; the stern, yet encouraging, stewardship of this trio ensured that I enjoyed the culture shock. Dal Wilson was more than a colleague and a post-doc; his pragmatic approach to physics provided the ideal counter-point in our attempts to forge a deeper understanding of things ranging from vibration isolation to the subtleties of quantum mechanics. Without the patient efforts of Amir, Ryan and Hendrik in designing, fabricating, and testing of devices, none of the results reported here would have been possible. I hope I have been able to bequeath a better vision of the future of our experiment to Sergey. Conversations with Alexey, Daniel and Nathan have enabled me to vicariously learn how to measure microwave "photons". John Jost once taught me how to decorate a Christmas tree; since then he has imparted some wisdom on frequency metrology, and some on atomic physics. Together with Dal, Victor and Caroline have probably spent the most time with me outside the lab; it was fun to exercise an air of social normalcy with this bunch. Christophe has been an amazing sparring partner on every subject capable of being brought under scientific scrutiny.The personal space required for the pursuit of science comes through the sacrifice of many people. My family back home in India -parents, sister, grand-parents -have had to patiently wait for the brief interludes when I go home. No words can do justice to this and the very many other pleasures they have surrendered over the years for my sake. Before physics attracted me, I was charmed by someone else; I am lucky to have married her. Long time friends, mentorsAjith and Subeesh -have played pivotal roles in my being able to engage in physics; I hope to repay this enormous debt, some day.It was a privilege to have learnt from a few great teachers during my formative years. Their vision of an indelible unity in nature continues to motivate my study of physics. vii AbstractThe precision measurement of position has a long-standing tradition in physics. Cavendish's verification of the universal law of gravitation using a torsion pendulum, Perrin's confirmation of the atomic hypothesis via the precise measurement of the Brownian motion, and, the verification of the mechanical effect of electromagnetic radiation, all belong to this classical heritage. Quantum mechanics posits that the measurement of position results in an uncertain momentum; an idea developed to full maturity within the ...

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