Article
Optics
Ting Wang, Ji-Liang Wu, Xu-Cheng Zhang, Yang Shi, Yue-De Yang, Jin-Long Xiao, Da-Ming Zhang, Guan-Shi Qin, Yong-Zhen Huang
Summary: In this paper, we demonstrate the generation of octave-spanning optical frequency combs with a repetition rate of tens of GHz for the first time using a four-wave mixing effect seeded by a dual-mode microcavity laser. Wideband optical frequency combs are generated using a Brillouin nonlinear fiber loop and shaped through optical filtering. The high-repetition-rate pulse train is amplified and compensated for dispersion, resulting in an octave optical comb spanning from 1100 to 2200 nm. We achieve frequency combs with octave bandwidths and repetition rates using dual-mode microcavity lasers.
PHOTONICS RESEARCH
(2022)
Article
Optics
Ashutosh Rao, Gregory Moille, Xiyuan Lu, Daron A. Westly, Davide Sacchetto, Michael Geiselmann, Michael Zervas, Scott B. Papp, John Bowers, Kartik Srinivasan
Summary: The study introduces an integrated photonics interposer architecture that effectively handles microcomb signals and achieves octave-spanning spectral filtering of optical frequency combs. This technology addresses the challenge of on-chip microcomb processing and has the potential to further apply miniaturized optical systems to other metrology-grade applications successfully.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Ji-Liang Wu, Xiaohui Guo, Yadong Jiao, Xucheng Zhang, Ting Wang, Yue-De Yang, Jin-Long Xiao, Daming Zhang, Guanshi Qin, Yong-Zhen Huang
Summary: In this study, an octave-spanning 10-GHz optical comb is achieved using a directly-modulated microlaser, and the optical pulse width is further reduced to 140 fs in a fiber through optimal chirp compensation.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
I. Tiliouine, G. Granger, C. E. Jimenez-Durango, Y. Leventoux, B. Wetzel, V. Couderc, S. Fevrier
Summary: We demonstrate the generation of a two-octave mid-infrared supercontinuum in unprocessed large core chalcogenide fiber, using a fiber-based laser that delivers 35 kW, 180 fs pulses at 4.53 μm.
RESULTS IN PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Vasilii Voropaev, Shangran Xie, Aleksandr Donodin, Daniil Batov, Mikhail Tarabrin, Johann Troles, Vladimir Lazarev
Summary: Researchers have successfully generated octave-spanning supercontinuum in As2S3-silica hybrid nanospike waveguides using a thulium-doped all-fiber femtosecond laser and amplifier system at a wavelength of 1.9 μm. The widest supercontinuum was obtained in the wavelength range of 1.1-2.5 μm, and it exhibited coherent characteristics throughout the entire spectral range, making it suitable for creating a self-referenced laser comb.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Ruiqi Zheng, Erwin Chan, Xudong Wang, Xinhuan Feng, Bai-Ou Guan, Jianping Yao
Summary: A technique is presented to suppress second and third order nonlinear distortions in a long-haul microwave photonic link, achieving a high spurious free dynamic range through adjustments to operational parameters and the polarization state of the light signal. The proposed MPL demonstrates excellent performance in achieving high SFDR regardless of transmission distance.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Irina Zhluktova, Andrei D. Zverev, Serafima A. Filatova, Vladimir A. Kamynin, Alexej A. Sysoliatin, Vladimir B. Tsvetkov
Summary: Octave-spanning supercontinuum conversion has been investigated in three different rare-earth doped fiber amplifiers. The erbium amplifier achieved an output power of 445 mW with a spectral width of 1250 nm. The thulium amplifier obtained an average output power of 390 mW and a spectral width of 569 nm. Additionally, the holmium amplifier produced an average output power of 724 mW with a spectral width of 450 nm. In all cases, the output pulse envelope did not exceed 0.72 ns.
Article
Optics
Enci Chen, Ping Lu, Xiaohui Li, Xiangzhen Huang, Yueheng Han, Deming Liu, Jiangshan Zhang
Summary: In this work, high-concentration MnO2 nanoparticles dispersions embedded in the hole cladding of dual-hole photonic crystal fiber is fabricated as a saturable absorber with a modulation depth of 4 % and a saturation intensity of 25 MW/cm2. By inserting a Sagnac fiber filter in the cavity, multi-state solitons are experimentally demonstrated with identical layout, respectively, which greatly improves the versatility of this laser. This study proves that MnO2 nanoparticles possess excellent nonlinear optical properties in the near-infrared band. The simple in-line structure of the proposed nanoparticles-deposited device could pave a way for high power and all-fiber applications of photonics.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Zhao Li, Fengbo Han, Zhipeng Dong, Qingyang Du, Zhengqian Luo
Summary: In this article, we theoretically investigate the propagation dynamics of mid-IR Raman soliton in a Ge28Sb12Se60 chalcogenide glass waveguide. By carefully engineering the waveguide dispersion and nonlinear interaction, we propose a suspended chalcogenide glass waveguide device that allows an octave-tuning, from 1.96 μm to 3.98 μm, Raman soliton source. Our result provides a solution to continuously tunable on-chip mid-IR ultrafast laser sources.
Article
Optics
Zhao Li, Qingyang Du, Chaopeng Wang, Jinhai Zou, Tuanjie Du, Kathleen A. Richardson, Zhiping Cai, Juejun Hu, Zhengqian Luo
Summary: This work presents the first experimental demonstration of an externally pumped on-chip ultrafast soliton laser source based on Raman soliton self-frequency shift. The source, using Ge28Sb12Se60 chalcogenide glass waveguides, achieves continuous wavelength tunability with high signal-to-noise ratios, significantly improving energy efficiency and demonstrating excellent spectral purity and stability. These results provide insights into soliton dynamics and critical device design guidelines, enabling a new class of broadly tunable, energy-efficient, compact, and potentially cost-effective on-chip ultrafast laser sources.
LASER & PHOTONICS REVIEWS
(2021)
Article
Engineering, Electrical & Electronic
Xiaoyu Chen, Xin Yan, Xuenan Zhang, Fang Wang, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng
Summary: A novel fiber-optic soliton self-frequency shift (SSFS) temperature sensor fabricated using an in-house made microstructured optical fiber was proposed. The sensing performance of the proposed sensor was evaluated experimentally and theoretically, and it exhibited high sensitivity and advantages in terms of fabrication process, mechanical strength, and cost.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Crystallography
Ashkan Ghanbari, Saeed Olyaee
Summary: This paper reveals the special design features of a highly nonlinear circular-lattice-silicon-core and silica-doped-with-fluorine (1%) cladding-composite photonic crystal fiber (PCF) that operates in the mid-infrared region. By utilizing small negative group velocity dispersion, managed higher order dispersions, and the unique nonlinearity of silicon, a supercontinuum broadening from 1500 nm to 4700 nm is achieved with low input power of 400 W over short fiber distances. The engineered structure of the fiber simplifies the manufacturing process compared to other nano-sized silicon PCFs. This designed fiber has great potential in applications such as gas sensing, soliton effect pulse compression, spectroscopy, and material processing.
Article
Nanoscience & Nanotechnology
Lanh Chu Van, Thuy Nguyen Thi, Bao Tran Le Tran, Duc Hoang Trong, Ngoc Vo Thi Minh, Hieu Van Le, Van Thuy Hoang
Summary: Numerical calculations of multi-octave spanning supercontinuum generation were carried out in two proposed As2Se3 photonic crystal fibers, taking into account the effects of vacuum noise and pulse-to-pulse relative intensity noise. The results showed high coherence in the SCG due to vacuum noise, but significant coherence reduction was observed due to pulse-to-pulse relative intensity noise, which depends on pulse duration and physical mechanisms of spectral broadening.
PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Md. Tanvir Mahmud Prince, M. Shah Alam
Summary: This study presents a systematic numerical analysis for designing a hexagonal lattice dual core photonic crystal fiber (DC-PCF) with excellent optical properties for supercontinuum generation (SCG) while being easy to fabricate. By using the finite element method and optimizing the structural parameters, the PCF structure achieves low confinement loss, high birefringence, large effective mode area, and negative chromatic dispersion. When excited by a specific pulse, the fiber generates a wide-spectrum supercontinuum covering a range from visible to near-IR region. The coherence property and noise effects of the generated supercontinuum are also investigated.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Biao Wang, Chunrong Jia, Jiantan Yang, Zhigang Di, Jianquan Yao, Jingxuan Zhang
Summary: The new PCF proposed for the terahertz region demonstrates flat dispersion and ultra-high birefringence, making it suitable for short-distance terahertz propagation and sensing applications.
IEEE PHOTONICS JOURNAL
(2021)
Article
Optics
Tristram J. Alexander, G. A. Tsolias, A. Demirkaya, Robert J. Decker, C. Martijn de Sterke, P. G. Kevrekidis
Summary: We theoretically demonstrate the existence of stable dark solitons in the presence of quartic dispersion and the coexistence of quadratic and quartic dispersive effects, revealing a wider range of solutions and dynamics compared to pure quadratic dispersion. The interplay of the two dispersion orders leads to oscillatory non-vanishing tails and the potential formation of bound, stable multi-soliton states. Additionally, dark soliton-like states connecting to low-amplitude oscillations are shown to be possible. The stability picture is supported by dynamical evolution results, and potential avenues for dark soliton generation are explored.
Article
Nanoscience & Nanotechnology
Alessio Stefani, Boris T. Kuhlmey, Justin Digweed, Benjamin Davies, Zizhen Ding, Hala Zreiqat, Mohammad Mirkhalaf, Alessandro Tuniz
Summary: Terahertz technology is a growing field in sensing and telecommunications. Researchers have developed photonic terahertz light cages (THzLCs) using 3D-printing technology, which guide light within a central hollow core. They demonstrate the design flexibility of THzLCs and characterize the propagation and bend losses in straight and curved waveguides. Additionally, they discuss appropriate figures of merit for evaluating the performance of light cage guidance.
Article
Engineering, Electrical & Electronic
Ziqian Zhang, Yang Liu, Benjamin J. Eggleton
Summary: This study overcomes the amplitude fluctuations in the generation of wideband microwave signals using optical methods and successfully demonstrates the stable photonic generation of 30 GHz wideband stepped-frequency signals. Compared to using electronic waveform generators, this method provides better signal-to-noise ratio and signal quality in radar imaging applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Cai Li, Yonghang Sun, Moritz Merklein, Benjamin J. Eggleton, Bill Corcoran
Summary: Optical carrier recovery based on stimulated Brillouin scattering is proposed in this study to overcome the performance limits of Kramers-Kronig direct detection systems. The experimental results demonstrate significant improvement in optical signal-to-noise ratio and receiver sensitivity, indicating the potential of this method to enhance reach or power requirements for such systems.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Gia Quyet Ngo, Emad Najafidehaghani, Ziyang Gan, Sara Khazaee, Malte Per Siems, Antony George, Erik P. Schartner, Stefan Nolte, Heike Ebendorff-Heidepriem, Thomas Pertsch, Alessandro Tuniz, Markus A. Schmidt, Ulf Peschel, Andrey Turchanin, Falk Eilenberger
Summary: This study demonstrates a method to achieve second-harmonic generation in functionalized optical fibers by directly growing highly nonlinear MoS2 monolayers on the fiber's core. The approach is scalable and can be generalized to other materials and waveguide systems.
Article
Optics
Behrad Gholipour, Stephen R. Elliott, Maximilian J. Mueller, Matthias Wuttig, Daniel W. Hewak, Brian E. Hayden, Li Yifei, Seong Soon Jo, Rafael Jaramillo, Robert E. Simpson, Junji Tominaga, Cui Yihao, Avik Mandal, Benjamin J. Eggleton, Martin Rochette, Mohsen Rezaei, Imtiaz Alamgir, Hosne Mobarok Shamim, Robi Kormokar, Arslan Anjum, Gebrehiwot Tesfay Zeweldi, Tushar Sanjay Karnik, Juejun Hu, Safa O. Kasap, George Belev, Alla Reznik
Summary: Alloys of sulfur, selenium and tellurium, known as chalcogenide semiconductors, provide a versatile and controllable material platform for a range of photonic applications. They have nonlinear optical and photoconductive properties, wide transmission windows, and various dielectric and plasmonic properties across different frequencies. The roadmap collection emphasizes the critical role of chalcogenide semiconductors in traditional and emerging photonic technologies, and showcases the potential of this field through selected socio-economically important research areas.
JOURNAL OF PHYSICS-PHOTONICS
(2023)
Article
Optics
Choon Kong Lai, Moritz Merklein, Alvaro Casas-Bedoya, Yang Liu, Stephen J. Madden, Christopher G. Poulton, Michael J. Steel, Benjamin J. Eggleton
Summary: This paper investigates the performance of a Brillouin-based isolation scheme in a traditional ridge waveguide. The study finds that acoustic confinement and Brillouin-driven mode conversion can be enhanced by selecting appropriate optical mode pairs and waveguide geometries. By optimizing the entire isolator design, including input couplers, mode filters, Brillouin-active waveguides, and device fabrication tolerances, it is predicted that the device can achieve 30 dB isolation over a 38 nm bandwidth with 500 mW pump power. In the presence of a +/- 10 nm fabrication-induced width error, such isolation can be maintained over a 5-10 nm bandwidth.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2023)
Article
Optics
Luke Mckay, Choon Kong Lai, Nicholas J. Athanasios, Duk-Yong Choi, Stephen J. Madden, Benjamin J. Eggleton, Mortiz Merklein
Summary: Microwave photonics provides a promising solution for frequency converting microwave signals. In this study, a chip-based stimulated Brillouin scattering and interferometry technique is used to demonstrate the first microwave photonic mixer with image rejection of broadband signals. The mixer achieves frequency down-conversion of carrier frequencies ranging from 10 GHz-16 GHz, ultra-high image rejection for single tone signals up to 70 dB, and image rejection of 28.5 dB and 16 dB for 100 MHz and 400 MHz wide analogue signals, respectively. Furthermore, the mixer successfully down-converts 200 Mb/s quadrature-phase-shift keying signals with a low error vector magnitude of -9.6 dB, even when there are interfering image signals present.
Article
Nanoscience & Nanotechnology
Ju Won Choi, Byoung-Uk Sohn, Ezgi Sahin, George F. R. Chen, Peng Xing, Doris K. T. Ng, Benjamin J. J. Eggleton, Dawn T. H. Tan
Summary: This manuscript investigates nonlinear pulse propagation in a chip-based nonlinear Bragg grating and observes clear signatures of gap soliton propagation, including slow light, intensity-dependent transmission, intensity-dependent temporal delay, and gap soliton compression.
Review
Peripheral Vascular Disease
Patrizia Natale, Jia Yi Ni, David Martinez-Martin, Ayano Kelly, Clara K. Chow, Aravinda Thiagalingam, Corinne Caillaud, Benjamin Eggleton, Nicole Scholes-Robertson, Jonathan C. Craig, Giovanni F. M. Strippoli, Allison Jaure
Summary: This study explored the perspectives and experiences of self-monitoring of blood pressure in patients with hypertension. The findings revealed that self-monitoring of blood pressure can empower patients, provide reassurance and convenience, and complement medical diagnosis and treatment. However, there are challenges such as inadequate knowledge and understanding of blood pressure targets and interpretation, limited access to monitoring devices, and psychological burdens associated with self-monitoring.
AMERICAN JOURNAL OF HYPERTENSION
(2023)
Correction
Optics
Richard M. Carter, Fei Yu, William J. Wadsworth, Jonathan D. Shephard, Tim A. Birks, Jonathan C. Knight, Duncan P. Hand
Summary: The authors made an error in drafting, resulting in Eq. (3) being incorrect in the published paper [Opt. Express 25, 20612 (2017)]. We present a corrected version of the equation. It should be noted that this does not affect the presented results or conclusions of the paper.
Article
Optics
Mohammed Sabbah, Federico Belli, Christian Brahms, Fei Yu, Jonathan Knight, John C. Travers
Summary: We investigate soliton self-compression and photoionization effects in an argon-filled antiresonant hollow-core photonic crystal fiber pumped with a commercial Yb:KGW laser. Before the onset of photoionization, we demonstrate selfcompression of our 220 fs pump laser to 13 fs in a single and compact stage. By using the plasma driven soliton selffrequency blueshift, we also demonstrate a tunable source from 1030 to similar to 700 nm. We fully characterize the compressed pulses using sum-frequency generation time-domain ptychography, experimentally revealing the full time-frequency plasma-soliton dynamics in hollow-core fiber for the first time.
Article
Optics
Ziqian Zhang, Yang Liu, Tegan Stephens, Benjamin J. J. Eggleton
Summary: Researchers have developed a photonic radar for non-contact vital sign detection, overcoming limitations of traditional monitoring methods. The radar achieves millimetre-level range resolution with a bandwidth of up to 30 GHz. The study also explores the use of optical signals generated by the system for LiDAR-based vital sign detection, offering potential for improved accuracy and system resilience.
Article
Materials Science, Multidisciplinary
Choon Kong Lai, Moritz Merklein, Duk-Yong Choi, Kunlun Yan, Alvaro Casas Bedoya, Stephen J. Madden, Benjami J. Eggleton
Summary: This paper presents the first experimental observation of reversible 1550 nm-induced Bragg gratings and stimulated Brillouin scattering (SBS) in a planar waveguide made of high-index chalcogenide material, arsenic triselenide (As2Se3). The temporary grating is inscribed by the two-photon absorption (TPA)-induced refractive index change along the waveguide, facilitated by the high Fresnel reflection from the chip facet. The SBS measurements reveal the Brillouin gain coefficient and frequency shift values, and the investigation explains the observed broadening of the linewidth due to the photorefractive effect in the waveguide.
OPTICAL MATERIALS EXPRESS
(2023)
Article
Engineering, Electrical & Electronic
Matthew Garrett, Moritz Merklein, Benjamin J. Eggleton
Summary: In this review paper, perspectives on the implementation of high-performance, wideband, chip-based Brillouin microwave photonic processing subsystems for phased array antennas are provided, including recent advances and a roadmap for further development.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
