Article
Engineering, Electrical & Electronic
Wenrui Wang, Xianshun Ming, Lei Shi, Kai Ma, Dezheng Ren, Qibing Sun, Leiran Wang, Wenfu Zhang
Summary: In this study, the generation of a broadband mid-infrared frequency comb in a silicon microring resonator is demonstrated through numerical simulations. The large-cross-section air-cladding waveguide is utilized to mitigate the absorption loss. The effects of higher order nonlinearities are also investigated, showing the possibility to obtain octave-spanning Raman-Kerr comb lines and pure Kerr frequency soliton combs.
IEEE PHOTONICS JOURNAL
(2023)
Article
Physics, Multidisciplinary
Yan Bai, Menghua Zhang, Qi Shi, Shulin Ding, Yingchun Qin, Zhenda Xie, Xiaoshun Jiang, Min Xiao
Summary: By generating a Brillouin laser in an optical microresonator and exciting the Kerr frequency comb in the same cavity, a soliton Kerr microcomb was achieved with narrow-linewidth comb lines and stable repetition rate. The system also demonstrated a low-noise microwave signal with excellent phase noise characteristics, showing promising practical applications.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
Lukasz A. Sterczewski, Mathieu Fradet, Clifford Frez, Siamak Forouhar, Mahmood Bagheri
Summary: Mid-wave infrared optical frequency combs (OFC) are crucial for spectroscopy applications. Quantum well diode laser (QWDL) OFC shows excellent spectral uniformity and narrow optical linewidths. The source offers a wide optical span and high repetition rate. QWDL OFCs are highly suitable for chip-based real-time sensing systems in the mid-infrared.
LASER & PHOTONICS REVIEWS
(2023)
Article
Multidisciplinary Sciences
Bok Young Kim, Jae K. Jang, Yoshitomo Okawachi, Xingchen Ji, Michal Lipson, Alexander L. Gaeta
Summary: In this study, all-optical synchronization of Kerr combs is demonstrated in the nonsolitonic, normal GVD regime, generating phase-locked combs with high pump-to-comb conversion efficiencies and relatively flat spectral profiles. The results reveal the universality of Kerr comb synchronization and suggest a promising path towards coherently combined normal GVD Kerr combs with spectrally flat profiles and high comb-line powers in an efficient microresonator platform.
Review
Chemistry, Multidisciplinary
Haochen Tian, Youjian Song, Minglie Hu
Summary: This review discusses the theoretical models of noise in mode-locked lasers and recent advancements in noise measurement for ultra-low-noise optical frequency combs, as well as their potential applications. The technology is envisioned to be fulfilled in novel optical frequency combs such as electro-optic modulated combs, microcombs, and quantum cascade laser combs.
APPLIED SCIENCES-BASEL
(2021)
Article
Optics
Gregory Moille, Daron Westly, Edgar F. F. Perez, Meredith Metzler, Gregory Simelgor, Kartik Srinivasan
Summary: In this study, a new approach was developed to embed integrated heaters in micro-ring resonators, enabling more efficient heating and more arbitrary routing of heater traces. Experimental results showed that micro-ring resonators with buried heaters had a larger tuning range and higher quality factors compared to devices with lateral heaters. Furthermore, the platform was able to generate broadband dissipative Kerr solitons.
Article
Optics
Siqi Lu, Guosheng Lin, Di Xia, Zifu Wang, Liyang Luo, Zhaohui Li, Bin Zhang
Summary: In this study, a sandwich-integrated all-ChG microresonator was used to demonstrate a mid-infrared (MIR) microcomb generator covering a wavelength range from 6.94μm to 12.04μm. The novel microresonator features a symmetrically uniform distribution of the mode field, precise dispersion engineering, and low optical loss, offering a wide transmission window, high Kerr nonlinearity, and hybrid-fabrication flexibility on a silicon wafer. Numerical simulations successfully demonstrated a MIR Kerr frequency comb with a bandwidth of 5.1μm, assisted by dispersive waves. A feasible fabrication scheme for on-demand ChG microresonators was also proposed. These findings highlight the advantages of integrated ChG photonic devices in MIR nonlinear photonics and their potential applications in MIR spectroscopy.
Article
Nanoscience & Nanotechnology
Qibing Sun, Wei Wu, Yi Wang, Yu Yang, Lei Shi, Xianshun Ming, Leiran Wang, Keyi Wang, Wei Zhao, Wenfu Zhang
Summary: Mid-infrared optical parametric oscillators (OPOs) are of great importance in precision spectroscopy and trace gas detection, and the challenge of realizing broadband mid-infrared OPOs within a single cavity still remains.
Article
Engineering, Electrical & Electronic
Jingshun Pan, Di Xia, Zifu Wang, Bin Zhang, Zhaohui Li
Summary: Optical frequency combs have revolutionized spectral measurement technologies, and chip-scale frequency combs based on microresonators are revolutionizing laser spectroscopy. Developing new photonic materials for integrated microcomb is critical, and the tutorial presents novel chalcogenide chip-based microcombs for broadband laser spectroscopy. The tutorial also reviews potent examples of dual-comb spectroscopy applications and discusses the challenges of realizing MIR microcombs for laser spectroscopy.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Rongxiang Guo, Weicheng Chen, Haoran Gao, Yang Zhao, Tiegen Liu, Zhenzhou Cheng
Summary: This study proposes the feasibility of developing mid-infrared Ge-based Kerr frequency combs, and analyzes their physical properties and generation mechanisms by establishing a comprehensive model. The study also demonstrates the conditions for generating frequency combs at specific pump wavelengths. This research provides useful guidance for the development of mid-IR Kerr frequency combs using CMOS technology.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Correction
Optics
Siyi Lu, Xin Liu, Yaqi Shi, Hang Yang, Zhe Long, Yang LI, Han Wu, Houkun Liang
Summary: An erratum is issued to correct an error in the author list, but the corrections have no impact on the results and conclusions of the original paper.
Article
Optics
Philipp Taeschler, Andres Forrer, Mathieu Bertrand, Filippos Kapsalidis, Mattias Beck, Jerome Faist
Summary: In recent years, there has been significant interest in optical frequency combs with frequency modulated output. This study demonstrates an asynchronous optical sampling technique that operates directly in the time domain. By using a mid-infrared quantum cascade laser frequency comb, they were able to measure both the instantaneous intensity and optical frequency of the comb. The results show a quasi-constant intensity output and a close to linear frequency chirp, consistent with phase-resolved spectral measurements. In contrast to previous works, stable phase-locking is achieved with positive intracavity dispersion, leading to an inversion of the observed frequency modulation.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Ziyang Wang, Ruihuan Wu, Bo Li, Jianping Guo, Hongzhan Liu
Summary: An actively mode-locked optoelectronic oscillator (OEO) with intensity feed-forward path is proposed and experimentally demonstrated for generating microwave frequency combs (MFCs) with high power flatness and wide spectrum range. The insertion of an intensity feed-forward path with the same time delay as the delay of the main loop in the actively mode-locked OEO optimizes the power flatness and spectrum range of the generated MFCs signal. Experimental results show significant improvements in power variations and power difference when the intensity feed-forward path is included in the loop. Moreover, the performance of the proposed scheme with different lengths of SMF inserted is also investigated in terms of SSB phase noise.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Ruijun Wang, Philipp Taeschler, Zhixin Wang, Emilio Gini, Mattias Beck, Jerome Faist
Summary: In this study, we achieve monolithic integration of mid-infrared lasers and low-loss waveguides, demonstrating continuous-wave lasing at room temperature and paving the way for on-chip mid-infrared dual-comb sensors.
Article
Optics
Takuma Nakamura, Venkata Ramaiah Badarla, Kazuki Hashimoto, Peter G. Schunemann, Takuro Ideguchi
Summary: This work demonstrates a simple and robust method of 1-mu m-pumped broadband IDFG for generating MIR pulses in the fingerprint region. The system also enables additional generations of ultrashort pulses in the ultraviolet and visible regions, showing potential for applications such as high-repetition-rate vibrational sum-frequency generation spectroscopy or pump-probe spectroscopy.
Article
Optics
Yun Zhao, Xingchen Ji, Bok Young Kim, Prathamesh S. Donvalkar, Jae K. Jang, Chaitanya Joshi, Mengjie Yu, Chaitali Joshi, Renato R. Domeneguetti, Felippe A. S. Barbosa, Paulo Nussenzveig, Yoshitomo Okawachi, Michal Lipson, Alexander L. Gaeta
Article
Optics
Yoshitomo Okawachi, Mengjie Yu, Boris Desiatov, Bok Young Kim, Tobias Hansson, Marko Loncar, Alexander L. Gaeta
Article
Optics
Linbo Shao, Neil Sinclair, James Leatham, Yaowen Hu, Mengjie Yu, Terry Turpin, Devon Crowe, Marko Loncar
Article
Multidisciplinary Sciences
Yoshitomo Okawachi, Mengjie Yu, Jae K. Jang, Xingchen Ji, Yun Zhao, Bok Young Kim, Michal Lipson, Alexander L. Gaeta
NATURE COMMUNICATIONS
(2020)
Review
Optics
Di Zhu, Linbo Shao, Mengjie Yu, Rebecca Cheng, Boris Desiatov, C. J. Xin, Yaowen Hu, Jeffrey Holzgrafe, Soumya Ghosh, Amirhassan Shams-Ansari, Eric Puma, Neil Sinclair, Christian Reimer, Mian Zhang, Marko Loncar
Summary: Lithium niobate is a versatile material that plays a significant role in daily life, particularly in the fields of optical communications and photonics. Thin-film lithium niobate integrated photonics is currently undergoing a revolution, enabling high-performance nanophotonic components such as optical modulators and nonlinear wavelength converters.
ADVANCES IN OPTICS AND PHOTONICS
(2021)
Article
Multidisciplinary Sciences
Yaowen Hu, Mengjie Yu, Di Zhu, Neil Sinclair, Amirhassan Shams-Ansari, Linbo Shao, Jeffrey Holzgrafe, Eric Puma, Mian Zhang, Marko Loncar
Summary: Efficient and tunable electro-optic frequency shifters controlled by continuous and single-tone microwaves are achieved through engineering the coupling between optical modes in ultralow-loss waveguides and resonators in lithium niobate nanophotonics. The devices provide high frequency shifts up to 28 gigahertz with an on-chip conversion efficiency of approximately 90%, and can be reconfigured as tunable frequency-domain beam splitters.
Article
Optics
Amirhassan Shams-Ansari, Dylan Renaud, Rebecca Cheng, Linbo Shao, Lingyan He, Di Zhu, Mengjie Yu, Hannah R. Grant, Leif Johansson, Mian Zhang, Marko Loncar
Summary: Integrated thin-film lithium niobate (TFLN) photonics is a promising platform for high-performance chip-scale optical systems. By integrating high-power lasers and modulators, we have achieved a high-power transmitter on the TFLN chip.
Article
Physics, Multidisciplinary
Amirhassan Shams-Ansari, Mengjie Yu, Zaijun Chen, Christian Reimer, Mian Zhang, Nathalie Picque, Marko Loncar
Summary: Laser frequency comb generators on photonic chips show the potential for integrated dual-comb microspectrometers. Among nanophotonic platforms, the low-loss thin-film lithium-niobate-on-insulator technology stands out with its ability to combine various optoelectronic and nonlinear optical functionalities. In this study, a critical step towards on-chip fabrication of a fully functional instrument is demonstrated with an electro-optic microring-based dual-comb interferometer. The system achieves spectra with a range of 1.6 THz and a resolution of 10 GHz in a single measurement without the need for frequency scanning or moving parts. The frequency agility of the system enables multiplexed sensing of non-adjacent spectral regions without compromising the signal-to-noise ratio. These findings highlight the promising potential of electro-optic-based nanophotonic technology for broad-spectral-bandwidth molecular sensing.
COMMUNICATIONS PHYSICS
(2022)
Article
Optics
Yaowen Hu, Mengjie Yu, Brandon Buscaino, Neil Sinclair, Di Zhu, Rebecca Cheng, Amirhassan Shams-Ansari, Linbo Shao, Mian Zhang, Joseph M. Kahn, Marko Loncar
Summary: Developments in integrated photonics have led to the emergence of stable, compact and broadband comb generators. The integrated electro-optic frequency comb presented in this research demonstrates a high conversion efficiency and a wide optical span, and can serve as an on-chip femtosecond pulse source. It also enables the simultaneous effects of electro-optic and third-order nonlinearity, paving the way for practical optical frequency comb generators and exploring new regimes of optical physics.
Article
Multidisciplinary Sciences
Yaowen Hu, Mengjie Yu, Neil Sinclair, Di Zhu, Rebecca Cheng, Cheng Wang, Marko Loncar
Summary: This article introduces the concept of frequency domain mirrors and explores their properties both theoretically and experimentally. The researchers demonstrate how the reflection of optical energy can be achieved in the frequency domain using electro-optic modulation, specifically through polarization and coupled-resonator-based coupling. This technique has potential applications in controlling light signals and various optical devices.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Mengjie Yu, David Barton Iii, Rebecca Cheng, Christian Reimer, Prashanta Kharel, Lingyan He, Linbo Shao, Di Zhu, Yaowen Hu, Hannah R. Grant, Leif Johansson, Yoshitomo Okawachi, Alexander L. Gaeta, Mian Zhang, Marko Loncar
Summary: A chip-scale femtosecond pulse source has been implemented on an integrated lithium niobate photonic platform, using cascaded low-loss electro-optic modulators and chirped Bragg grating. The device is tunable, robust, and low-cost, with continuous-wave-to-pulse conversion efficiencies an order of magnitude higher than previous integrated sources.
Proceedings Paper
Engineering, Electrical & Electronic
Amirhassan Shams-Ansari, Dylan Renaud, Rebecca Cheng, Linbo Shao, Lingyan He, Di Zhu, Mengjie Yu, Hannah R. Grant, Leif Johansson, Mian Zhang, Marko Loncar
Summary: In this study, we demonstrate an integrated high-power laser on thin-film lithium niobate with 60-mW optical power in the waveguides. Using this platform, we successfully realize a high-power transmitter consisting of an electrically-pumped laser integrated with a 50-GHz modulator.
2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Di Zhu, Yaowen Hu, Boris Desiatov, Linbo Shao, Mengjie Yu, Marko Loncar
Summary: The electro-optic polarization modulator on thin-film lithium niobate demonstrates indirect interband transition between two polarization modes, enabling non-reciprocal, single-sideband modulation.
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Mengjie Yu, Christian Reimer, Yoshitomo Okawachi, Prashanta Kharel, Linbo Shao, Di Zhu, Yaowen Hui, Alexander L. Gaeta, Mian Zhang, Marko Loncar
Summary: In this study, researchers have successfully realized an electro-optic time lens on a lithium niobate photonic chip, generating a flat-top comb spectrum with a bandwidth of 10.5 nm and a 30 GHz pulse train with a duration of 532 fs.
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Yaowen Hu, Mengjie Yu, Brandon Buscaino, Neil Sinclair, Di Zhu, Amirhassan Shams-Ansari, Linbo Shao, Mian Zhang, Joseph M. Kahn, Marko Loncar
Summary: The new electro-optic frequency comb source, based on coupled lithium niobate microresonators, achieves a 100x higher pump-to-comb conversion efficiency (30%) and 2.4x broader optical bandwidth (117 nm) compared to the previous broadest electro-optic frequency comb.
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2021)
