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Self-referenced photonic chip soliton Kerr frequency comb

Light(Science & Applications) 2016年第1期5卷 282-287页

作者： Victor Brasch Erwan Lucas John D Jost Michael Geiselmann Tobias J Kippenberg École Polytechnique Fédérale de Lausanne(EPFL)–IPHYS Lausanne CH-1015Switzerland

Self-referencing turns pulsed laser systems into self-referenced frequency *** frequency combs allow counting of optical frequencies and have a wide range of *** required optical bandwidth to implement self-referencing is typically obtained via nonlinear broadening in optical *** advances in the field of Kerr frequency combs have provided a path toward the development of compact frequency comb sources that provide broadband frequency combs,exhibit microwave repetition rates and are compatible with on-chip photonic *** devices have the potential to significantly expand the use of frequency *** to date,self-referencing of such Kerr frequency combs has only been attained by applying conventional,fiber-based broadening *** we demonstrate external broadening-free self-referencing of a Kerr frequency *** optical spectrum spanning two-thirds of an octave is directly synthesized from a continuous wave laser-driven silicon nitride microresonator using temporal dissipative Kerr soliton formation and soliton Cherenkov *** this coherent bandwidth and two continuous wave transfer lasers in a 2f–3f self-referencing scheme,we are able to detect the offset frequency of the soliton Kerr frequency *** stabilizing the repetition rate to a radio frequency reference,the self-referenced frequency comb is used to count and track the continuous wave pump laser’s *** work demonstrates the principal ability of soliton Kerr frequency combs to provide microwave-to-optical clockworks on a chip.

关键词： frequency combs integrated optics Kerr frequency combs metrology microresonator frequency combs nonlinear optics

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Broadband frequency Comb for Calibration of Astronomical Spectrographs

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Journal of Applied Mathematics and Physics 2016年第2期4卷 202-205页

作者： Pu Zou Tilo Steinmetz Armin Falkenburger Yuanjie Wu Lingtong Fu Michael Mei Ronald Holzwarth Menlo Systems GmbH Am Klopferspitz 19a 82152 Martinsried Germany

We present our state-of-the-art version of a frequency comb for calibration of astronomical spectrographs. The mode spacing of the frequency comb can be designed to match the resolution of a spectrograph. Combined with its excellent accuracy and stability, the spectral coverage of more than 70% of the whole visible spectrum range makes the frequency comb an ideal calibration source. In addition, the new version introduces the automatic start-up function that brings convenience to the astronomers.

关键词： frequency combs Astronomical Spectrograph Calibration

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Lithium niobate microring with ultra-high Q factor above 10～8

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Chinese Optics Letters 2022年第1期20卷 122-126页

作者：高仁宏姚妮管江林邓莉林锦添汪旻乔玲玲方伟程亚 State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-Intense Laser Science Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences (CAS) Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Research Center for Intelligent Sensing Zhejiang Lab XXL—The Extreme Optoelectromechanics Laboratory School of Physics and Electronic Science East China Normal University State Key Laboratory of Precision Spectroscopy East China Normal University State Key Laboratory of Modern Optical Instrumentation College of Optical Science and Engineering Zhejiang University Collaborative Innovation Center of Extreme Optics Shanxi University Collaborative Innovation Center of Light Manipulations and Applications Shandong Normal University Shanghai Research Center for Quantum Sciences

We demonstrate integrated lithium niobate(LN) microring resonators with Q factors close to the intrinsic material absorption limit of *** microrings are fabricated on pristine LN thin-film wafers thinned from LN bulk via chemo-mechanical etching without ion slicing and ion etching.A record-high Q factor up to 10～8 at the wavelength of 1550 nm is achieved because of the ultra-smooth interface of the microrings and the absence of ion-induced lattice damage,indicating an ultra-low waveguide propagation loss of ～0.0034 dB/*** ultra-high Q microrings will pave the way for integrated quantum light source,frequency comb generation,and nonlinear optical processes.

关键词： Chemical vapor deposition Femtosecond laser writing frequency combs Lithium niobate Q factor Quantum light sources

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