supported by the National Key R&D Program of China(Grant No.2021YFF0603802);the National Natural Science Foundation of China(Grant No.61905231);the State Administration for Market Regulation(Grant No.CXTD202301);the Innovation Program for Quantum Science and Technology(Grant No.2021ZD0300902)。
Two^(87)Sr optical lattice clocks(OLCs)are being developed and operated at the National Institute of Metrology(NIM),located on different campuses that are 40km apart.In order to compare the optical frequencies of thes...
This letter describes the implementation of a high-precision time and frequency transmission system using a two-way and wavelength division multiplexing scheme over 3,143.6 km of field fiber links,connecting 21 sites ...
supported by the National Natural Science Foundation of China(Grant Nos.12303076 and 12303077).
Our primary objective is to mitigate the adverse effects of temperature fluctuations on the optical frequency transmission system by reducing the length of the interferometer.Following optimization,the phase-temperatu...
supported by the National Major Science and Technology Infrastructure Project of China,for“High Precision Ground-based Time Service System”(Grant No.2017-000052-73-01-002401);the National Natural Science Foundation of China(Grant No.12033007)。
An implementation of high-precision time transfer over a 1839-km field fiber loop back link between two provincial capitals of China,Xi’an and Taiyuan,is reported.Time transfer stabilities of 6.5 ps at averaging time...
supported by the National Natural Science Foundation of China(Grant Nos.62005212 and 12075190);the Young Talent Fund of University Association for Science and Technology in Shaanxi,China(Grant No.20210112);the New Star Project of Science and Technology of Shaanxi Province(Grant No.2022KJXX-69),the Fund for Outstanding Young Talents of China Academy of Space Technology(Xi’an)(Grant No.Y21-RCFYJQ1-03);the Young Elite Scientists Sponsorship Program by CAST(Grant No.2022QNRC001);the Open Foundation of State Key Laboratory of Transient Optics and Photonics(Grant No.SKLST202207).
A D-shaped fiber is coated with a new two-dimensional nanomaterial,violet phosphorus(VP),to create a saturable absorber(SA)with a modulation depth of 3.68%.Subsequently,the SA is inserted into a fiber laser,enabling s...
supported by the National Key Research and Development Program of China(Grant No.2022YFB4601101);the Beijing Natural Science Foundation(Grant No.JQ21019);the National Natural Science Foundation of China(Grant Nos.11975001,11974003,12075034,12075190,and 12261131495);the New Star Project of Science and Technology of Shaanxi Province(Grant No.2022KJXX-69);the BUPT Excellent Ph.D.Students Foundation(Grant No.CX2022121);the Hebei Key Laboratory of Physics and Energy Technology(Grant No.HBKLPET2023_03)。
Tungsten sulphoselenide(WSSe) alloys, belonging to the transition metal dichalcogenide family, have attracted significant interest in the area of optoelectronics because of their unique optical and electronic properti...
supported by the National Key Research and Development Program of China(Grant No.2022YFB4601101);the Beijing Natural Science Foundation(Grant No.JQ21019);the National Natural Science Foundation of China(Grant Nos.11975001,12075034,and 12261131495)。
Fiber laser is a fundamental component of laser systems and is of great significance for development of laser technology.Its pulse output can be divided into Q-switched and mode-locked.Achieving ultrashort pulse with ...
the Beijing Natural Science Foundation(Grant No.JQ21019);the National Natural Science Foundation of China(Grant Nos.12075034 and 11974003)。
Topological insulator materials,including Bi_(2)Te_(3),Sb_(2)Te_(3),Sb_(2)Te_(3),and Bi_(2)Se_(3),have attracted some attention due to their narrow band gaps,high carrier mobility,wide spectral absorption ranges and o...
supported by the National Key Research and Development Program of China(Grant No.2016YFF0200200);the National Natural Science Foundation of China(Grant Nos.91636101,12103059,91836301,and 11803041);the Youth Innovation Promotion Association of the Chinese Academy of Sciences(Grant No.1188000XGJ);the West Light Foundation of the Chinese Academy of Sciences(Grant No.XAB2016B47);the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB21000000)。
We demonstrate the coherent transfer of an ultrastable optical frequency reference over a 490 km noisy field fiber link.The fiber-induced phase noise power spectrum density per-unit-length at 1 Hz offset frequency can...
supported by the Key Program of Beijing Municipal Natural Science Foundation(Grant No.KZ201910005006);the National Natural Science Foundation of China(Grant No.62005004);the Natural Science Foundation of Beijing Municipality(Grant No.4204091);the National Science Foundation for Post-doctor Scientists of China(Grant No.212423)。
We report an all-fiberized chirped pulse amplification system without any bulk devices.The stretcher and compressor are chirped fiber Bragg gratings inscribed in a 6/125μm single-mode fiber and a 30/250μm largemode-...