Article
Engineering, Electrical & Electronic
Elizabeth Chen, Larry A. Coldren, Joseph M. Kahn
Summary: Multi-wavelength analog coherent links using mode-locked laser (MLL) frequency combs as transmitter and local oscillator (LO) sources are proposed. Carrier recovery (CR) is achieved using optical phase-locked loops (PLLs), while polarization demultiplexing and static phase offset removal are performed using cascaded optical phase shifters. The proposed design shows reduced power consumption and improved phase-error performance compared to other designs.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Guang Yang, Haosen Shi, Yuan Yao, Hongfu Yu, Yanyi Jiang, Albrecht Bartels, Longsheng Ma
Summary: This study presents a long-term frequency-stabilized optical frequency comb based on a Ti:sapphire laser, achieving automated operation and stable repetition rate through optimized laser cavity design. By combining fast and slow piezos, as well as analog and digital feedback, the carrier envelope offset frequency was successfully stabilized, extending the continuous stability time to five days. The residual jitters of the repetition rate and carrier envelope offset frequency both meet the requirements for various applications demanding precision and short operation time for optical frequency combs.
CHINESE OPTICS LETTERS
(2021)
Article
Optics
Stijn Cuyvers, Bahawal Haq, Camiel Op de Beeck, Stijn Poelman, Artur Hermans, Zheng Wang, Agnieszka Gocalinska, Emanuele Pelucchi, Brian Corbett, Gunther Roelkens, Kasper Van Gasse, Bart Kuyken
Summary: Research shows that leveraging ultra-low losses of silicon-nitride waveguides to manufacture a III-V-on-silicon-nitride integrated optical comb laser leads to superior performance, high efficiency, and low manufacturing costs.
LASER & PHOTONICS REVIEWS
(2021)
Article
Engineering, Electrical & Electronic
Yujia Li, Dongmei Huang, Hongjie Chen, Feng Li, P. K. A. Wai
Summary: This study investigates the statistical properties of phase noise in a swept source-based coherent detection system (CDS) using a Fourier domain mode locked (FDML) laser, both theoretically and experimentally. The study finds that the probability density function (PDF) of the measured residual phase jitter (RPJ) is close to the Gaussian distribution, and the variance of the RPJ increases quadratically with the optical path difference of the CDS. Numerical simulations using stationary white noise confirm these findings, and the experimental results align well with the simulations. Overall, this study provides insights into the noise property of FDML laser-based CDS and evaluates the temporal coherence of swept lasers.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Dongmei Huang, Feng Li, Zihao Cheng, Xinhuan Feng, P. K. A. Wai
Summary: The article introduces a novel discrete FDML laser with intracavity optical intensity modulation, which can generate swept signals with comb lines uniformly distributed in the frequency domain and achieve generating discrete k-space uniform swept signals with different FSRs and pulse durations.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Jia-Jian Chen, Wen-Qi Wei, Jia-Le Qin, Bo Yang, Jing-Zhi Huang, Zi-Hao Wang, Ting Wang, Chang-Yuan Yu, Jian-Jun Zhang
Summary: Multi-wavelength injection locked lasers have been demonstrated on silicon substrates, showing narrow optical linewidths and stable operation, highlighting their great potential as tunable on-chip multi-wavelength light sources.
PHOTONICS RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
Meysam Bahmanian, J. Christoph Scheytt
Summary: This article presents the theory of a special type of optoelectronic phase-locked loop (PLL) and demonstrates its application in frequency synthesizers. Through analysis and implementation, it shows that the optoelectronic PLL can achieve extremely low jitter and phase noise in the frequency range of 5 to 20 GHz.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Engineering, Electrical & Electronic
Xiao-Zhou Li, Mohamed Seghilani, Luis Romero Cortes, Jose Azana
Summary: The study demonstrates pulse repetition-rate multiplication of a low-rate commercial mode-locked laser source, showing its potential for generating optical frequency combs with ultra-broad frequency spacings. Through detailed experimental and numerical analysis, the method is found to be efficient in producing OFCs without the need for high-speed electronics, while offering important versatility.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Physics, Applied
Ting Wang, Jiliang Wu, Yuede Yang, Jinlong Xiao, Yongzhen Huang
Summary: This article presents a highly coherent optical frequency comb (OFC) technology based on the spectral broadening of a phase-locked dual-wavelength microcavity laser. By directly modulating the microcavity laser to generate multiple sidebands, the cross-injection locking of the dual modes is achieved, resulting in an improved beat-signal linewidth from 13.5 MHz to less than 100 Hz. Subsequently, 21 flat comb teeth in a +/- 3 dB power variation are achieved by combining a phase modulator. Finally, an OFC with a bandwidth of 16 nm is successfully realized by narrowing the optical pulse and spectral broadening in a commercial nonlinear optical fiber. The repetition rate has a low phase noise of -102 dBc Hz(-1) at 10 kHz offset, demonstrating the generated OFC has a high degree of coherence.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Vincent Billault, Ghaya Baili, Hugues Guillet de Chatellus, Loic Morvan, Daniel Dolfi, Vincent Crozatier
Summary: The effect of CW injection in an actively mode-locked laser at 780 nm on noise performances shows a significant improvement in RF phase noise and power spectrum, but at the expense of degraded optical relative intensity noise.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Nobuhide Yokota, Hiroshi Yasaka
Summary: The study explores a novel concept of cascaded single side band (SSB) comb generation to improve the carrier-to-noise ratio (CNR) as the bandwidth of the SSB comb widens. Experimentally, a maximum CNR improvement of 11.3 dB was demonstrated under injection locking (IL) conditions. This proposed technique effectively enhances the CNR of wide-bandwidth SSB combs.
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
Zejiang Deng, Yang Liu, Zhiwei Zhu, Daping Luo, Chenglin Gu, Lian Zhou, Gehui Xie, Wenxue Li
Summary: This study presents an approach to construct an ultralow-noise OFC by utilizing electro-optic modulators as fast actuators to extend the feedback bandwidth. By measuring the optical beat signal and carrier-envelope offset frequency, the architecture is validated to ensure coherent tracking of an optical reference with ultralow noise, indicating a universal tool for accurate, high-resolution optical spectroscopy.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Honggang Sun, Lixin Wang, Jinhai Zou, Qiujun Ruan, Yu Ding, Chuchu Dong, Zhipeng Dong, Zhengqian Luo
Summary: We report the first visible-wavelength all-fiber passively mode-locked vortex laser, capable of delivering picosecond optical vortex pulses with adjustable pulse duration and narrow linewidth. This study also demonstrates the potential applications of this technology in particle trapping, optical tweezers, and high-resolution microscopy.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
S. L. Camenzind, D. Koenen, B. Willenberg, J. Pupeikis, C. R. Phillips, U. Keller
Summary: Pulse trains emitted from dual-comb systems with low relative timing jitter can be measured using an optical heterodyne detection approach. A new laser with precise timing and low noise has been characterized using this technique.
