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Wu G, Bai L, Yu P, Fan M, Sun L, Li Y, Yu F, Wang Z, Zhao X. Growth, Optical, and Spectroscopic Properties of Pure and Nd 3+-Doped GdSr 3(PO 4) 3 Crystals with Disordered Structure. Inorg Chem 2021; 61:170-177. [PMID: 34847322 DOI: 10.1021/acs.inorgchem.1c02561] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Disordered crystals have attracted immense attention for the generation of ultrashort laser pulses due to their good thermomechanical characteristics and wide emission bandwidths. In this work, a Gd-based orthophosphate crystal, GdSr3(PO4)3, (GSP), and a Nd3+-doped GdSr3(PO4)3 crystal, (Nd:GSP), were obtained by the Czochralski method. The crystal structure, optical properties, electronic band structure, laser damage threshold, and hardness of the GSP crystal were comprehensively investigated. It exhibited a disordered structure due to the random distribution of Sr and Gd atoms in the same Wyckoff site, which caused inhomogeneous spectral broadening. Additionally, it exhibited a short UV absorption cutoff edge (<200 nm), a large band gap (5.81 eV), and a high laser damage threshold (∼1850 MW/cm2). The spectral properties and Judd-Ofelt calculations of the Nd:GSP crystals were analyzed. A wide absorption band at 803 nm, with a full width at half-maximum value of 20 nm, makes the Nd:GSP crystal suitable for the efficient pumping of AlGaAs laser diodes. Sub-100-fs pulses could be supported by its 25 nm emission bandwidth. Hence, the GSP crystal could be a promising disordered crystal laser matrix.
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Affiliation(s)
- Guangda Wu
- State Key Laboratory of Crystal Materials, Center for Optics Research and Engineering, Shandong University, Jinan 250100, P. R. China
| | - Linyu Bai
- State Key Laboratory of Crystal Materials, Center for Optics Research and Engineering, Shandong University, Jinan 250100, P. R. China
| | - Pingzhang Yu
- State Key Laboratory of Crystal Materials, Center for Optics Research and Engineering, Shandong University, Jinan 250100, P. R. China
| | - Mengdi Fan
- Key Laboratory of Laser & Infrared System, Shandong University, Ministry of Education, Qingdao 266237, China
| | - Li Sun
- State Key Laboratory of Crystal Materials, Center for Optics Research and Engineering, Shandong University, Jinan 250100, P. R. China.,Key Laboratory of Laser & Infrared System, Shandong University, Ministry of Education, Qingdao 266237, China
| | - Yanlu Li
- State Key Laboratory of Crystal Materials, Center for Optics Research and Engineering, Shandong University, Jinan 250100, P. R. China
| | - Fapeng Yu
- State Key Laboratory of Crystal Materials, Center for Optics Research and Engineering, Shandong University, Jinan 250100, P. R. China.,Key Laboratory of Laser & Infrared System, Shandong University, Ministry of Education, Qingdao 266237, China
| | - Zhengping Wang
- State Key Laboratory of Crystal Materials, Center for Optics Research and Engineering, Shandong University, Jinan 250100, P. R. China
| | - Xian Zhao
- State Key Laboratory of Crystal Materials, Center for Optics Research and Engineering, Shandong University, Jinan 250100, P. R. China.,Key Laboratory of Laser & Infrared System, Shandong University, Ministry of Education, Qingdao 266237, China
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Tian W, Yu C, Zhu J, Zhang D, Wei Z, Xu X, Xu J. Diode-pumped high-power sub-100 fs Kerr-lens mode-locked Yb:CaYAlO 4 laser with 1.85 MW peak power. OPTICS EXPRESS 2019; 27:21448-21454. [PMID: 31510222 DOI: 10.1364/oe.27.021448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 07/03/2019] [Indexed: 06/10/2023]
Abstract
We demonstrated a diode-pumped high-power Kerr-lens mode-locked Yb:CaYAlO4 (Yb:CALYO) laser with a dual-confocal cavity, directly generating 59-fs pulses with 6.2 W average power, which is the highest average power from any sub-60 fs Yb-doped solid-state lasers. With the repetition rate of 50 MHz, the corresponding single pulse energy was 124 nJ and the peak power was 1.85 MW, which to the best of our knowledge is the highest peak power delivered directly from a sub-100 fs Yb-based bulk lasers ever.
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Ma J, Huang H, Ning K, Xu X, Xie G, Qian L, Loh KP, Tang D. Generation of 30 fs pulses from a diode-pumped graphene mode-locked Yb:CaYAlO4 laser. OPTICS LETTERS 2016; 41:890-893. [PMID: 26974072 DOI: 10.1364/ol.41.000890] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Stable 30 fs pulses centered at 1068 nm (less than 10 optical cycles) are demonstrated in a diode pumped Yb:CaYAlO4 laser by using high-quality chemical vapor deposited monolayer graphene as the saturable absorber. The mode-locked 8.43 optical-cycle pulses have a spectral bandwidth of ∼50 nm and a pulse repetition frequency of ∼113.5 MHz. To the best of our knowledge, this is the shortest pulse ever reported for graphene mode-locked lasers and mode-locked Yb-doped bulk lasers. Our experimental results demonstrate that graphene mode locking is a very promising practical technique for directly generating few-cycle optical pulses from a laser oscillator.
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Yu Z, Han H, Xie Y, Peng Y, Xu X, Wei Z. CEO stabilized frequency comb from a 1-μm Kerr-lens mode-locked bulk Yb:CYA laser. OPTICS EXPRESS 2016; 24:3103-3111. [PMID: 26906875 DOI: 10.1364/oe.24.003103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report the first Kerr-lens mode-locked (KLM) bulk frequency comb in the 1-μm spectral regime. The fundamental KLM Yb:CYA laser is pumped by a low-noise, high-bright 976-nm fiber laser and typically provides 250-mW output power and 57-fs pulse duration. Only 58-mW output pulses were launched into a 1.3-m photonic crystal fiber (PCF) for one octave-spanning supercontinuum generation. Using a simplified collinear f-2f interferometer, the free-running carrier-envelope offset (CEO) frequency was measured to be 42-dB signal-to-noise ratio (SNR) for a 100-kHz resolution and 9.6-kHz full width at half maximum (FWHM) under a 100-Hz resolution. A long-term CEO control at 23 MHz was ultimately realized by feeding the phase error signal to the pump power of the oscillator. The integrated phase noise (IPN) of the locked CEO was measured to be 316 mrad with an integrated range from 1 Hz to 10 MHz. The standard deviation and Allan deviation for more than 4-hour recording are 1.6 mHz and 5.6 × 10(-18) (for 1-s gate time), respectively. This is, to the best of our knowledge, the best stability achieved among the 1-μm solid-state frequency combs.
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Pirzio F, Cafiso SDDD, Kemnitzer M, Guandalini A, Kienle F, Veronesi S, Tonelli M, Aus der Au J, Agnesi A. Sub-50-fs widely tunable Yb:CaYAlO(4) laser pumped by 400-mW single-mode fiber-coupled laser diode. OPTICS EXPRESS 2015; 23:9790-9795. [PMID: 25969019 DOI: 10.1364/oe.23.009790] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Yb:CaYAlO(4) has been investigated spectroscopically and compared to better known Yb:CaGdAlO(4). It turns out that both materials show very similar spectroscopic parameters relevant to ultrafast lasers design. Employing single-mode fiber-coupled 400-mW laser diode at 976 nm we measured pulses as short as 43 fs, and broad tunability of 40 nm with a simple single-prism setup.
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Di JQ, Zhou DH, Xu XD, Xia CT, Gao W, Zheng HR, Sai QL, Mou F, Xu J. Spectroscopic properties of Tm,Ho:CaYAlO4single crystal. CRYSTAL RESEARCH AND TECHNOLOGY 2014. [DOI: 10.1002/crat.201300347] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- J. Q. Di
- Key Laboratory of Materials for High Power Laser; Shanghai Institute of Optics and Fine Mechanics; Chinese Academy of Sciences; Shanghai 201800 China
- University of Chinese Academy of Sciences; Beijing 100039 China
| | - D. H. Zhou
- Key Laboratory of Materials for High Power Laser; Shanghai Institute of Optics and Fine Mechanics; Chinese Academy of Sciences; Shanghai 201800 China
- University of Chinese Academy of Sciences; Beijing 100039 China
| | - X. D. Xu
- Key Laboratory of Transparent and Opto-functional Inorganic Materials; Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 201800 China
| | - C. T. Xia
- Key Laboratory of Materials for High Power Laser; Shanghai Institute of Optics and Fine Mechanics; Chinese Academy of Sciences; Shanghai 201800 China
| | - W. Gao
- College of Physics and Information technology; Shaanxi Normal University; Xi'an 710062 China
| | - H. R. Zheng
- College of Physics and Information technology; Shaanxi Normal University; Xi'an 710062 China
| | - Q. L. Sai
- Key Laboratory of Materials for High Power Laser; Shanghai Institute of Optics and Fine Mechanics; Chinese Academy of Sciences; Shanghai 201800 China
| | - F. Mou
- Key Laboratory of Materials for High Power Laser; Shanghai Institute of Optics and Fine Mechanics; Chinese Academy of Sciences; Shanghai 201800 China
- University of Chinese Academy of Sciences; Beijing 100039 China
| | - J. Xu
- Key Laboratory of Transparent and Opto-functional Inorganic Materials; Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 201800 China
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Tan WD, Tang DY, Xu CW, Zhang J, Xu XD, Li DZ, Xu J. Evidence of dissipative solitons in Yb³⁺:CaYAlO₄. OPTICS EXPRESS 2011; 19:18495-18500. [PMID: 21935218 DOI: 10.1364/oe.19.018495] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Operation of an end-pumped Yb³⁺:CaYAlO₄ laser operating in the positive dispersion regime is experimentally investigated. The laser emitted strongly chirped pulses with extremely steep spectral edges, resembling the characteristics of dissipative solitons observed in fiber lasers. The results show that dissipative soliton emission constitutes another operating regime for mode locked Yb³⁺-doped solid state lasers, which can be explored for the generation of stable large energy femtosecond pulses.
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Affiliation(s)
- W D Tan
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore
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