Article
Optics
Huang-jun Zeng, Zhang-lang Lin, Valentin Petrov, Pavel Loiko, Yujin Chen, Yidong Huang, Ge Zhang, Xavier Mateos, Wen-ze Xue, Haifeng Lin, Li Wang, Weidong Chen
Summary: We report the generation of the first sub-60 fs pulse from a diode-pumped SESAM mode-locked Yb-laser using a non-centrosymmetric Yb:YAl3(BO3)4 crystal. By utilizing a spatially single-mode, fiber-coupled 976 nm InGaAs laser diode, the laser exhibited a slope efficiency of 65.1% and a wavelength tuning range of 59 nm. With the implementation of a commercial SESAM and a 1 mm-thick laser crystal, the laser achieved pulses as short as 56 fs at a central wavelength of 1044.6 nm.
Article
Optics
Jinfang Yang, Zhaohua Wang, Jiajun Song, Renchong Lv, Xianzhi Wang, Jiangfeng Zhu, Zhiyi Wei
Summary: A diode-pumped femtosecond Yb:CALGO laser with a semiconductor saturable absorber mirror (SESAM) is demonstrated for stable mode-locking operation, achieving a perfect beam profile under high output power with high peak power and optical-to-optical efficiency.
HIGH POWER LASER SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Electrical & Electronic
Jingchong Wang, Chen Guan, Yang Liu, Zhenhua Cong, Shiwu Wang, Yi Nie, Zhigang Zhao, Zhaojun Liu
Summary: In this study, a red laser diode-pumped Alexandrite laser with a semiconductor saturable absorber mirror for passive Q-switching was presented. By using customized SESAMs, a pulsed Alexandrite laser at 749.6 nm with an average power of 0.904 W, a repetition rate of 20.27 kHz, and a pulse energy of 44.59 μJ was achieved.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Optics
M. D. Rotondaro, B. Zhdanov, M. K. Shaffer, Z. J. Eyler, R. J. Knize
Summary: This paper presents the first demonstration of passive mode-locking in a diode-pumped alkali laser (DPAL). An intracavity cesium vapor cell, buffered by atmospheric pressure methane, is used to passively mode lock a continuously pumped cesium DPAL with a static gain medium. A train of short pulses with duration less than 460 ps was observed using a 2.0-GHz bandwidth detector that limited the real time duration measurements. The calculated minimum duration for these pulses is 57 ps.
Article
Optics
Seong-Hoon Kwon, Dong Hoon Song, In-Sik Kim, Do-Kyeong Ko
Summary: The research focused on the operating characteristics of a saturable absorber mirror (SESAM)-assisted mode-locked laser oscillator with SESAM placed in different positions. Comparisons were made between SESAM locations in the middle and at the end of the cavity. Factors studied included characteristics of mode-locked pulses, loss, wavelength-dependency, stability criteria, and application to a Herriott-multipass cavity laser oscillator. Results showed no spatial chirp in the output beam of the designed laser oscillator and successful application to a Herriott-multipass cavity laser oscillator delivering sub-microjoule pulse energy.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Wen-Ze Xue, Zhang-Lang Lin, Huang-Jun Zeng, Ge Zhang, Peixiong Zhang, Zhenqiang Chen, Zhen Li, Valentin Petrov, Pavel Loiko, Xavier Mateos, Haifeng Lin, Yongguang Zhao, Li Wang, Weidong Chen
Summary: We report on the continuous-wave and mode-locked laser performance of Yb3+-doped yttrium-gadolinium orthoaluminate crystal. The maximum output power in the continuous-wave regime was 429 mW at 1041.8 nm with a slope efficiency of 51.1% and a wavelength tuning range of 84 nm (1011-1095 nm). The self-starting mode-locked operation using a semiconductor saturable absorber mirror produced soliton pulses as short as 43 fs.
Article
Optics
Pin-Wen Cheng, Yu-Hsin Hsu, Xiu-Wei Chang, Hsing-Chih Liang, Yung-Fu Chen
Summary: The study thoroughly explores the dynamics of diode-pumped passively mode-locked solid-state lasers using real-time measurement at a temporal sampling rate of up to 40 GHz. A concise cavity is used to isolate the transient dynamics from the gain medium and saturable absorber. The experimental results reveal the presence of passively Q-switched pulses and damped relaxation oscillations before stable mode-locking, indicating the formation of single clean mode-locked pulses before the relaxation oscillation stage. This real-time exploration provides valuable information for practical applications involving temporal modulation of pump intensity.
Article
Optics
Lei Guo, Yaling Yang, Shengzhi Zhao, Tao Li, Wenchao Qiao, Ruihua Wang, Baitao Zhang, Kejian Yang, Jingliang He, Xun Li
Summary: A diode-pumped SESAM continuous-wave mode-locked (CWML) Tm:CALGO laser with a new center wavelength of 1968 nm and ultra-long Z-shaped folding cavity configuration achieved a total maximum dual-output power of 328 mW and maximum single pulse energy of 4.2 nJ.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Huang-Jun Zeng, Zhang-Lang Lin, Wen-Ze Xue, Ge Zhang, Zhongben Pan, Haifeng Lin, Pavel Loiko, Xavier Mateos, Valentin Petrov, Li Wang, Weidong Chen
Summary: Passive mode-locking of a disordered Yb:Ca3Gd2(BO3)(4) crystal using SESAM was successfully demonstrated, generating nearly Fourier-transform-limited pulses with high efficiency and low laser thresholds. Continuous wavelength tuning and promising potential for ultrafast laser development at around 1 μm were also shown in the study.
APPLIED SCIENCES-BASEL
(2021)
Article
Physics, Multidisciplinary
Yang Yu, Yuehang Chen, Wenlong Tian, Li Zheng, Geyang Wang, Chuan Bai, Xuan Tian, Haijing Mai, Yulong Su, Jiangfeng Zhu, Zhiyi Wei
Summary: We demonstrate a Kerr-lens mode-locked Yb:LYSO laser with a pulse duration of 54 fs and a spectral bandwidth of 25 nm centered at 1062 nm, which is the shortest pulse duration obtained from this type of laser. At a repetition rate of 378.3 MHz, an output power of 111.6 mW is achieved using an output coupler with 0.6% transmittance, enabling long-term stable mode-locking for more than 13 hours.
Article
Optics
Jonas Heidrich, Marco Gaulke, Behcet Ozgur Alaydin, Matthias Golling, Ajanta Barh, Ursula Keller
Summary: Two SESAM characterization setups are presented for precise measurement of SESAM parameters, allowing for nonlinear reflectivity and time-resolved recovery dynamics measurements.
Article
Optics
Shijia Sun, Huang-Jun Zeng, Zhang-Lang Lin, Wen-Ze Xue, Ge Zhang, Zhoubin Lin, Valentin Petrov, Haifeng Lin, Pavel Loiko, Xavier Mateos, Yongguang Zhao, Bing Teng, Li Wang, Weidong Chen
Summary: In this study, we demonstrate the first sub-40 fs soliton pulse generation from a diode-pumped Yb:Sr3Y2(BO3)(4) laser passively mode-locked by a semiconductor saturable absorber mirror. Pulses as short as 38 fs at a central wavelength of 1051.7 nm were achieved with high average output power and optical efficiency.
Article
Instruments & Instrumentation
Jingyu Zou, Lunbin Zhou, Wanxin Zheng, Kai Feng, Bin Xu
Summary: The paper reports on a high-power and high-efficiency NLM mode-locked Nd:YVO4 laser with in-band pumping using an 880-nm diode laser, achieving a maximum average output power of 6.76 W and a slope efficiency of 54.5%. The use of a type I LBO crystal with small group velocity mismatch enabled the generation of pulses as short as 6.5 ps, representing one of the best performances for NLM mode-locked Nd:YVO4 lasers. NLM mode locking shows promise for high-power ultrashort pulse generation in visible and middle infrared wavelengths where existing technologies have limitations.
INFRARED PHYSICS & TECHNOLOGY
(2021)
Article
Optics
Samuel Paul David, Venkatesan Jambunathan, Fangxin Yue, Antonio Lucianetti, Tomas Mocek
Summary: This study presents the performance of diode-pumped Yb:LuAG lasers in cryogenic conditions in both continuous wave and pulsed modes, with a focus on the optimal crystal temperature of 140K. The use of Cr:YAG saturable absorbers for passive Q-switching resulted in significant improvements in pulse energy and peak power.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Xiang Li, Jia Xu Brian Sia, Jiawei Wang, Zhongliang Qiao, Wanjun Wang, Xin Guo, Hong Wang, Chongyang Liu
Summary: In this study, a frequency-modulated optical frequency comb (OFC) is generated using a 1.65μm single-section quantum well laser. The comb formation process is characterized by narrowing of the optical linewidth through mutual injection locking. Furthermore, the driving mechanism of comb formation is confirmed to be four-wave mixing (FWM) through FWM frequency conversion characterization on a semiconductor optical amplifier.
