A5100343042- Solid State Laser Technologies
- Glass properties and applications
- Luminescence Properties of Advanced Materials
- Advanced Fiber Laser Technologies
- Photonic Crystal and Fiber Optics
- Advanced Fiber Optic Sensors
- Concrete and Cement Materials Research
- Phase-change materials and chalcogenides
- Spectroscopy and Laser Applications
- Optical Systems and Laser Technology
- Photorefractive and Nonlinear Optics
- Geological and Geochemical Analysis
- Ocular and Laser Science Research
- Crystal Structures and Properties
- Laser-Matter Interactions and Applications
- Porphyrin and Phthalocyanine Chemistry
- Laser Design and Applications
- Recycling and utilization of industrial and municipal waste in materials production
- Laser Material Processing Techniques
China Jiliang University
2016-2024
Shanghai Institute of Optics and Fine Mechanics
2004-2013
Chinese Academy of Sciences
2004-2013
We demonstrate a mode-locked all-fiber Tm laser using single mode-step index multimode-graded-index multimode-single mode fiber structure as saturable absorber based on the nonlinear multimodal interference. Stable fundamentally mode-locking operation was obtained at pump threshold of 180mW. The output soliton pulses had center wavelength, spectral width, pulse duration, and repetition rate 1888 nm, 3.6 1.4 ps, and19.82 MHz, respectively. This is simple, low-cost, stable, convenient...
A new type of fluoride glasses with high erbium-doping concentration (up to 6 mol. % Er(3+)) is investigated. The intensive 2.7 μm fluorescence demonstrated minimized quenching. intensity parameters and radiative properties are determined from the absorption spectrum based on Judd-Ofelt theory. prepared Er(3+)-doped ZBYA glass possesses predicted spontaneous-transition probability (28.92 s(-1)) large calculated emission cross section (9.8×10(-21) cm(2)). All these results indicate that this...
We demonstrate, for the first time, use of a stretched single mode-graded-index multimode-single mode fiber (SMF-GIMF-SMF) structure as saturable absorber (SA) passively mode-locked Tm laser. Such an all-fiber SA was based on nonlinear multimode interference (NL-MMI). Stable fundamentally mode-locking operation obtained at pump threshold 100mW. The output soliton pulses had center wavelength, spectral width, pulse duration, and repetition rate 1931 nm, 3.77 1.2ps, 19.94 MHz, respectively....
An Er 3+ -doped lead-free bismuth germanate glass is synthesized.Its 2.7-µm emission property analyzed, and the efficient from observed under 980-nm laser diode excitation.The prepared possesses high spontaneous transition probability (64.8 s -1 ) a large calculated cross section (6.61×10 -21 cm 2 corresponding to 4 I 11/2 → 13/2 transition.The multiphonon relaxation rate for excited state only 236 .Therefore, excellent spectroscopic properties outstanding thermal stability suggest that this...
Intense 2.7-µm emissions are obtained from Er 3+ /Nd co-doped tellurite glass samples under the 808-nm laser diode excitation.According to absorption spectra, Judd-Ofelt parameters and radiative transition probabilities calculated analyzed using theory.The spectroscopic properties energy transfer mechanism between Nd analyzed.The effects of OH -content on discussed.The results indicate that can significantly develop optical emission, if - groups be effectively eliminated.
The use of Yb <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3+</sup> co-doping with Ho to enhance the : xmlns:xlink="http://www.w3.org/1999/xlink">5</sup> I <sub xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> → xmlns:xlink="http://www.w3.org/1999/xlink">7</sub> ~ 2.84-μm emissions is investigated in tellurite-germanate glasses. An intense emission a full width at half maximum (FWHM) 132 nm achieved /Yb co-doped glass upon excitation 980...
Enhanced 3 μm luminescence of Dy3+ based on the effective process Yb3+:F5/22→Dy3+:H5/26 with a higher energy transfer coefficient 7.36×10-39 cm6/s in fluoaluminate glass modified by TeO2 was obtained. The efficiency from Yb3+ to Dy3+/Yb3+ codoped as high 80%, indicating Yb3+. temperature transition (Tg) and larger characteristic temperatures (ΔT,Kgl) revealed better thermal properties prepared glasses compared traditional glasses, which is great benefit fiber drawing. lower hydroxyl content...
åºäºäº§ç3 μmä¸çº¢å¤æ¿å çEr<sup>3+</sup>è½é转æ¢è¿ç¨ä¸è½çº§ä½ç³»ï¼å»ºç«äºæºéæ°åç©å 纤æ¿å å¨çéçæ¹ç¨åä¼ è¾æ¹ç¨ï¼ç³»ç»å°ç 究äºæ³µæµ¦ç»æåå 纤é¿åº¦å¯¹è¾åºåçãæçæç以åè å 泵浦åæ¿å åçåå¸çå½±åï¼ä¸ºåç»çå®éªæä¾ç论ä¾æ®ã仿çç¡®å®äºå°æ³µæµ¦åççå å¨çæ³çå 纤é¿åº¦ä¸º4~8 mï¼æç»å®éªéæ©4.7 må 纤å®æäºä¸çº¢å¤æºéæ°åç©å å¨è¿ç»æ¿å è¾åºå...
A germanate-tellurite glass (GeO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> -TeO -K O-Nb O xmlns:xlink="http://www.w3.org/1999/xlink">5</sub> -La xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> ) with thulium doping has been investigated for application as a laser material at 2 μm region. Under the 808 nm diode pumped, intense 1.8 emission is obtained. The maximum value of cross-section and radiative lifetime Tm <sup...