Journal Club

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＜Journal Club auditing

Fiscal Year 2024

  • July 9 (Tuesday) 12:20 ~ 12:55
  • Online
  • Yuta Motoya
  • Light: Light Sci Appl 13, 75 (2024)
  • Sartanee Suebka, Euan McLeod & Judith Su

Presentation Details:

 

Whispering gallery mode(WGM)microtoroidal resonancevessel is the most sensitive biochemical sensor in existence.1It is one,Single molecules can be detected.The main barriers to getting these devices out of the lab are,Light evanes to these devices via tapered optical fibers.cent bonding. This makes the taper fragile,They suffer from mechanical vibration and require precise positioning.In this study, light is injected into the toroid via free-space coupling,Observing scattered light eliminates the need for optical fibers.Digital Micromirror Devices(DMD)and combinations,Observation of light injection and scattered light by combining a distance objective lens,and imaging. With this approach,Electromagnetic induced permeability with indirect coupling in free space(EIT)and Fano co.The first time we were able to observe the sounding of the By this,This enables improved sensing sensitivity. Large effective coupling area(numerical aperture (in photography)=0.14Diameter in~10μm)By,Accurate positioning is not required. This system andFLOWER (Frequency Locked Whispering Evanescent Resonator)Combination of methods,Sensing performance was verified by conducting temperature sensing experiments.While adjusting input powerFLOWERBy tracking the resonance of theand thermal nonlinear optical effects. This study,WGMmicrotto expand the implementation of Lloyd's resonators to real-world applications.We believe it will be the foundation.
  • July 8 (Monday) 12:20 ~ 12:55
  • Online
  • Ryo Otake
  • Light: The optics express,. 32, 3,(2024)
  • Malong Hu, Shuyi Xu, Shulin Ding, Bing He, Min Xiao, and Xiaoshun Jiang

Presentation Details:

In this study, the boson peak is taken into account in silica micro optical resonators.Theoretical Raman-induced self-frequency shift of dissipative cur-solitons in theThe results were studied. As a result, we found thatThe boson peak significantly increases the self-frequency shift of the soliton andthan the shift due to the Lorenz response for a given pulse duration.The results also show that the contribution of theAlso, the Raman shock time reconstructed by this is relatively long palThe results of this study showed that the pulse width is also related to the pulse width in the case of a pulse width of 1.5 ms. In addition, theContinuous waves in the background interfering with the soliton cause the soliton to self-frequency shiftThe results also showed that the number ofThis theoretical and simulation result is based on thePrevious experiments in silica-based cursor soliton microcombsvalues are very consistent with the values of the
  • May 27 (Monday) 11:45 ~ 12:20
  • Online
  • Yoshitake Yamaguchi
  • Light: Nature Photonics volume 18, pages294-299 (2024)
  • Alexander E. Ulanov, Thibault Wildi, Nikolay G. Pavlov, John D. Jost, Maxim Karpov& Tobias Herr

Presentation Details:

This paper is the realization of a self-infusion locking (SIL)-type microcombResearch for
We are dealing with the research of Silicon Nitride Photonic Crystal RingResonator (PhCR).
Use synthetic reflections to generate stable single soliton statesWe show you how.
The nanopatterns are used for the following purposes. It does not rely on conventional random Rayleigh scattering to derive nanopatterns.Advancement by entering
It controls the wave and the backward wave to generate a stable return light. This allows the trustworthyReliable SIL and
Enables soliton generation, portable sensors and data processingExpected to be applied in the following areas
The results of the experiment are shown in Figure 1. Experimental results show that the synthetic reflections are more sensitive to the DKS (Disperse Com Soliton) stability and
efficiency.

  • June 17 (Monday) 12:20 ~ 12:55
  • Online
  • Hayato Matsuyama
  • Light: Optics Letters Vol. 49, Issue 11, pp. 2865-2868 (2024)
  • Yantang Huang , Songsong Liao, Bifeng Tu, Qiling Xu, Zhiping Zeng, Canhua Xu

Presentation Details:

In this paper,Yb3+/Er3+Amplified spontaneous release of co-added silica microspherescoming out(ASE)Excitation by light sourceTuned lasers were studied.ASEUse of lightAnd in,Microcavity coupling clauses in the process of broadband tuningAvoiding synchronization of cases,Practical applications of tunable lasers with microcavities are facilitated.The first time I saw him, he was a very good friend of mine.Yb3+/Er3+In co-doped silica microspheres, the central wavelength1μm(at sentence-end, falling tone) indicates a confident conclusionASEBecause the light source is insensitive to polarization, about1595nm(at sentence-end, falling tone) indicates a confident conclusionStable single-mode lasers were generated.For all-optical modulation of the laser's mode, the magnetronCopper thin film was coated by sputtering.The heating control of microspheres and linear tuning of the laser mode are,by the copper film incident from the stem of the microsphere.ASEReal by absorption of lightRevealed. The tuning range was190 GHzreached the

  • June 10 (Monday) 12:20 ~ 12:55
  • Online
  • Yusei Tanto
  • Light: Optics Letters Vol. 49, Issue 11, pp. 2865-2868 (2024)
  • Ekaterina Krutova, Lauri Salmela, Zahra Eslami, Tanvi Karpate, Mariusz Klimczak, Ryszard Buczynski, and Goëry Genty

Presentation Details:

Super Continuum (SC)The light source is a broadband, coherent white pulsed light source.A single light source covers a wide range of wavelengths for spectral analysis andOCT(lessening the significance or value of the previous word) the likes ofThe new system can be used for the following purposes. Until now, it has not been possible toSCLight source generation generally involves the use of stonesEnglish fiber is used.2400nmCovers wavelengths aboveI couldn't do it.In recent years, nanostructures have allowed graded indices (GRIN)A method to realize fiber has been proposed.Fibers can now be made from materials with large nonlinearities and wide transmission bandwidths.The research was carried out in the following way. In this study, telluriteGRINCreate multimode fiber and，790~2900nm(at sentence-end, falling tone) indicates a confident conclusionSCThe results show that the new method successfully generates theThe result of thisSCLow-energy light sources, andIt paves the way for wavelength extension to the infrared.
  • June 3 (Monday) 12:20 ~ 12:55
  • Online
  • Ryoaki Takabayashi
  • Light: Optics Letters 49,2449-2452 (2024)
  • Chao Tang, Mingming Nie, Jia-yang Chen, Zhaohui Ma, Zhan Li, Yijun Xie, Yong Meng Sua, Shu-Wei Huang, and Yu-Ping Huang

Presentation Details:

 

lithium niobate(LN)is the same asStrong confinement of modes to nanoscale waveguides, andAt the same time, second-order nonlinearities are large, dispersion control is easy, andIt has excellent features such as phase matching using periodic structure.The platform is a platform that is not aOn the other hand, for the demonstration of frequency combs with small walk-off conditionsIt is unexplored. In this paper, we will discuss theLNBroadband using thin-film dispersion controlThe generation of an optical frequency comb at the center wavelength1560nmand780nmThe demonstration will be conducted in the following two cases. In this demonstration, we have demonstrated that each of the wavelength bands has a80nm,12nmbandwidth was achieved.This result paves the way for secondary soliton generation.
  • May 21 (Tuesday) 12:20 ~ 12:55
  • Online
  • Imamura, Mantaro
  • Light: Light Sci. Appl. 13, 66 (2024)
  • Pu Li, Qizhi Li, Wenye Tang, Weiqiang Wang, Wenfu Zhang, Brent E. Little, Sai Tek Chu, K. Alan Shore, Yuwen Qin, and Yuncai Wang

Presentation Details:

Random bit generators are used for information security, cryptography, andIt is important in stochastic models and simulations.Currently, random bit generation requires the use ofSpeed and scalability are issues. In this study, we used theBased on a single microring resonator, 100 Tbit/A massively parallel scheme for s-scale ultra-fast random bit generation.Proposal. Modulation instability (MI) in a microring resonatorBy using chaos.com byHundreds of independent random bitstreams without bias simultaneouslyThe system is capable of generating In the proof-of-concept experiment, the2 Tbit/ with only 7 comb lines.The results show that it is possible to generate random bitstreams exceeding 1.5 s.This bit rate is the same as that of theCan be easily improved by increasing the number of com wires usedThe approach of this research is to develop a new method for secure communication and high-performance computation. The approach taken in this study is to develop a new method for secure communication and high-performance computation.Very fast and scalable chip-scale random biThe new system is a new generation of the "C" type.

  • May 16 (Thursday) 12:20 ~ 12:55
  • Online
  • Liao Ohtake
  • Light: Optics express 31, 18-28 (2023)
  • in hwan do, daewon suk, dongin jeong, seokjoo go, kiyoung ko, hyun-gue hong, dai-hyuk yu, jae hoong lee, and hansuek lee

Presentation Details:

It produces a single self-locked Raman soliton andTuning the relative threshold power between OPO and induced Raman scatteringBy,Different spectral dynamics of the frequency combs were characterized.Wide RF linewidth (320 kHz) via Raman scattering photonssech2It is possible to generate enveloping Raman comUnder certain conditions, theSimultaneously, spontaneous and deterministic generation of a single Raman soliton is achievedThe soliton is a single soliton that has been self-locked. This self-locked single soliton is,Generated without an external locking mechanism, theIt was maintained for more than 2 hours. Also,Bu requiring FSR suitable for SBS generation in microcavities.In contrast to the liruan soliton, theRaman solitons have no such constraints, andThe possibility of generating solitons with various repetition rates.This study was conducted byThe first experiment to produce a single self-locked Raman soliton, the...

  • May 15 (Wed) 12:20 ~ 12:55
  • Online
  • Ayaka Shikata
  • Light: Nature 627, 540-545 (2024).
  • Shuman Sun, Beichen Wang, Kaikai Liu, Mark W. Harrington, Fatemehsadat Tabatabaei, Ruxuan Liu, Jiawei Wang, Samin Hanifi, Jesse S. Morgan, Mandana Jahanbozorgi, Zijiao Yang, Steven M. Bowers, Paul A. Morton, Karl D. Nelson, Andreas Beling, Daniel J. Blumenthal & Xu Yi

Presentation Details:

Demonstrated integrated chip-scale OFD (optical frequency division), veryLow noise
Millimeter wave generation is realized. Planar waveguide base with large mode volumeThe coil resonator of
Phase stability is ensured by using a waveguide-coupled microcavity, and a waveguide-coupled microcavity is used to generateliving solitonma
The frequency division was performed from optical to millimeter-wave frequencies using an ICROCOM. The generatedof the 100 GHz signal that was
As the phase noise, the previously reported SiN-based microwave andMore than two orders of magnitude lower than
The noise level is -114 dBc/Hz at an offset frequency of 10 kHz.The first time the bells were reached.
The integration of millimeter-wave generation is a blurring of communication, radar, and sensing systems.Ixlue and
This device will be used for semiconductor lasers and amplifiers in the future.Instrument, Photo Detectors
The ability to heterogeneously integrate with other types of materials and to use them in a wide range of applications is expected.

  • May 1 (Wed) 12:20 ~ 12:55
  • Online
  • Junnosuke Kokubun
  • Light: Nat. Commun. 15, 3645(2024).
  • Yuanbin Liu, Hongyi Zhang, Jiacheng Liu, Liangjun Lu, Jiangbing Du, Yu Li, Zuyuan He, Jianping Chen, Linjie Zhou & Andrew W. Poon

Presentation Details:

Kerr soliton generation by silicon nitride (SiN) andThe system integrates a silicon (Si) modulator, dispersion compensator, and receiver.WDM communication over single-mode fiber was demonstrated. 1.68Tbit/The transmission speed of 1.5 s was achieved, and dispersion compensation at 40 km SMF was reduced to 1/1 of that of commercial transceivers.The number of bits per second has been successfully reduced to 6. In the future, 10Tbit/The potential to achieve data rates in excess of 1.5 s is a significant advantage of this technology, and it is expected to be used in the future.It is expected to improve the efficiency of interconnection in data centers, etc.

  • April 25 (Thursday) 12:20 ~ 12:55
  • Online
  • Tomoya Yamakawa
  • Light: Science & Applications 12 223 (2023)
  • Huiqi Li, Zhaocong Wang, Lei Wang, Yang Tan and Feng Chen

Presentation Details:

Whispering-gallery-mode microcavity lasers have become an essential element in the evolution of microlasers due to their remarkable characteristics, such as high Q-values and compact geometry. However, the application of solid-state whispering-gallery-mode lasers has been hampered by their low output power and limited optical conversion efficiency. Here we present the achievement of milliwatt laser radiation from a solid-state whispering-gallery-mode laser at a wavelength of 1.06 μm. To accomplish this, a whispering-gallery-mode microcavity (30 μm in diameter) is fabricated using a crystalline Nd: YAG thin film obtained by carbon-implantation enhanced etching of Nd: YAG crystals. This microcavity laser delivers a maximum output power of 1.12 mW and an optical conversion efficiency of 12.41 TP3T. In addition, our unique eccentric microcavity design allows for efficient coupling of free-space pump light and easy integration with the waveguide. This integration enables the emission of a single wavelength laser from the waveguide, achieving an output power of 0.5 mW and an optical conversion efficiency of 6.181 TP3T. This work opens new possibilities for the advancement of solid-state whispering gallery-mode lasers and provides an option for compact light sources.