Results 51 to 60 of about 9,926 (249)

Wavelength-Switchable 2 μm Single-Longitudinal-Mode Thulium-Doped Fiber Laser Based on Dual-Active Cavity and DLTCTR

Photonics
A thulium-doped fiber laser (TDFL) with a dual-active cavity and a directly linked three-coupler triple-ring filter is designed and demonstrated. Its operational principle is analyzed, and a corresponding experimental setup is built.
Pengfei Wang, Qi Qin, Fengping Yan, Dandan Yang, Chenhao Yu, Junjie Hu, Xiqing Cao, Darui Xu, Peng Liu, Biao Guan, Ying Guo   +10 more
doaj   +1 more source

Cavity-QED measurements of the ^{87}Sr millihertz optical clock transition and determination of its natural linewidth

Physical Review Research, 2021
We demonstrate the direct quantum nondemolition detection of a millihertz linewidth optical atomic transition. We observe the modification of the phase and amplitude of a probe field interacting with strontium atoms, which provides a direct spectroscopic
Juan A. Muniz, Dylan J. Young, Julia R. K. Cline, James K. Thompson   +3 more
doaj   +1 more source

Color Center Formation in Silicon‐On‐Insulator for On‐Chip Photonic Integration

Advanced Optical Materials, EarlyView.
ABSTRACT Color centers in silicon have great potential as single photon sources for quantum technologies. Some of them – like the T center – also possess optically‐active spins that enable spin‐photon interfaces for generating entangled photons and multi‐spin registers. This paper explores the generation of several types of color centers in silicon for
Arnulf J. Snedker‐Nielsen, David R. Gongora, Magnus L. Madsen, Christian H. Christiansen, Eike L. Piehorsch, Mathias Ø. Augustesen, Elvedin Memisevic, Sangeeth Kallatt, Rodrigo A. Thomas, Mark K. Svendsen, James L. Webb, Peter K. Jeppesen, Marianne E. Bathen, Lasse Vines, Peter Granum, Stefano Paesani   +15 more
wiley   +1 more source

Pump-induced stimulated superradiant Smith-Purcell radiation with ultra-narrow linewidth

eLight
Lasers with the gain medium of gas, liquid, semiconductor, and solid could generate coherent light with rather narrow spectral linewidth, which play an important role in the fields of communication, measurement, sensing, and so on. Although free electron
Yuechai Lin, Jinyu Li, Fang Liu, Weisi Meng, Pan Pan, Hanqi Feng, Wei Zhang, Xue Feng, Kaiyu Cui, Jinjun Feng, Yidong Huang   +10 more
doaj   +1 more source

High-power, ultra-low-noise cascaded diamond Raman lasers with spectrum compression

High Power Laser Science and Engineering
Stimulated Raman scattering is a third-order nonlinear optical effect that is not only effective for wavelength converting laser output, but also for single longitudinal-mode output due to the absence of spatial hole burning. Diamond is a prominent Raman-
Hui Chen, Zhongan Zhao, Wenqiang Fan, Yunpeng Cai, Boyuan Zhang, Jie Ding, Yaoyao Qi, Bingzheng Yan, Yulei Wang, Zhiwei Lu, Zhenxu Bai   +10 more
doaj   +1 more source

Output characteristics of an intracavity-pumped dual-wavelength narrow-linewidth laser with reabsorption losses [PDF]

AIP Advances
Quasi-three-level dual-wavelength narrow-linewidth lasers are vital for precision applications, but reabsorption-induced energy transfer inefficiencies hinder performance, creating a critical optimization gap.
Yu Liu, Hanyou Su, Kaihui Gu, Miao Yu, Zhenxi Bao, Yunuo Han   +5 more
doaj   +1 more source

Unraveling and Mitigating Resolution Loss in UV‐Assisted Vapor Phase Polymerization of Monolithic PEDOT:Tosylate Electrochromic Patterns

Advanced Optical Materials, EarlyView.
This work aims to understand the origin of pattern deviation in PEDOT:Tos films formed via vapor phase polymerization on UV‐exposed oxidant. UV exposure induces formation of loosely bound water which diffuses and produces macroscopic structuring at increased block copolymer contents.
Raufar Shameem, Bruno Mendes, Suraya Kazi, Robert Brooke, Jesper Edberg, Peter Andersson Ersman, Magnus P. Jonsson   +6 more
wiley   +1 more source

When Cubic is Not Isotropic: Phonon–Exciton Decoupling in CuInSnS4 Single Crystals

Advanced Optical Materials, EarlyView.
A cubic CuInSnS4 crystal does not fully play by cubic rules. While phonons follow the average iso‐tropic lattice symmetry, the disorder‐localized excitons break away, showing strong, and reproduci‐ble polarization‐dependent emission. This work shows how intrinsic cation disorder can turn a mac‐roscopically cubic material into a source of hidden ...
Lara Kim Linke, Yvonne Tomm, Xinyun Liu, Galina Gurieva, Daniel M. Többens, Pardis Adams, Michel Calame, Ryan W. Crisp, Jessica Boland, Seán Kavanagh, Susan Schorr, Mirjana Dimitrievska   +11 more
wiley   +1 more source

Retrieval of Gas Temperature and Pressure Based on Rayleigh–Brillouin Spectrum

IEEE Access, 2020
Optical detection methods such as Rayleigh-Brillouin scattering spectrum can be used for physical parameter measurement in solids, liquids, and gas. In this paper, a new method based on spectral characteristics is proposed to realize temperature and ...
Peng Zhang, Jiaqi Xu, Ruizhe Zhang, Qian Sun, Hang Wu, Yangrui Xu, Bo Zhou, Kun Liang   +7 more
doaj   +1 more source

GeSn Quantum Wells for Room‐Temperature Mid‐Infrared Lasing on Si and on Insulator Platforms

Advanced Optical Materials, EarlyView.
This work demonstrates a high‐performance GeSn‐on‐Insulator (GeSnOI) platform achieving laser emission up to room temperature. By utilizing Group IV GeSn quantum well heterostructures, we successfully reached a target wavelength of 3.3 µm. This advancement paves the way for fully integrated Mid‐IR photonic CMOS‐compatible sources, overcoming the ...
Antoine Meyer, Hector‐Mauricio Reynoso‐de la Cruz, Omar Concepción, Prateek Kaul, Konstantinos Pantzas, Etienne Herth, Z. Ikonic, Giovanni Capellini, Detlev Grützmacher, Moustapha El Kurdi, Dan Buca   +10 more
wiley   +1 more source