High Power Ho:YAP Laser With 107 W of Output Power at 2117 nm

Tang, Jinwen; Li, Enhao; Wang, Fei; Yao, Weichao; Shen, Chibing; Shen, Deyuan

doi:10.1109/jphot.2020.2968745

Cited by 14 publications

(5 citation statements)

References 24 publications

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“…The design was based on three power amplification stages, thus generating a highest average output power of 73.1 W with 17 ns of pulse width, at a repetition rate of 3 kHz. Jinwen et al demonstrated a Ho: YAP laser excited by a Tm-doped MOPA system generating optical power of 107 W and slope efficiency (SE) of 50.6% at 2117.1 nm, for an absorbed pump power of 215.4 W [7]. Qian et al proposed a mid-infrared pulsed ZGP MOPA system operating at repetition rate of 2 kHz, while generating an output energy of 52 mJ [8].…”

Section: Introductionmentioning

confidence: 99%

Modeling and analysis of single-mode widely tunable all-fiber Ho-doped CW master oscillator power amplifier system

Mirza,

Salaria,

Ghafoor

et al. 2024

Phys. Scr.

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We report the design of an all-fiber single-mode polarization maintaining widely tunable Ho-doped master oscillator power amplifier (MOPA) system operating in the wavelength range of 2005-2135 nm based on a pre-amplifier and two power amplification stages. The single clad Ho-doped active fibers in the ring cavity based master oscillator, pre-amplifier, and power amplifiers are pumped using 1950 nm semiconductor laser diode pump sources. The amplification of the MOPA system is investigated over the entire spectral range of 2005-2135 nm. The highest output power achieved by the continuous wave (CW) Ho-doped MOPA system is 43 W at a wavelength of 2028.6 nm using pump power of 20 W with power conversion efficiency (PCE) of 90% for second power amplifier while the total pump power of Ho-doped MOPA system is 45 W. Optical bandpass filters (OBPFs) are employed between different stages of MOPA system to enable amplification over the wider spectral range of 2005-2135 nm by suppressing the amplified spontaneous emission (ASE). Not using OBPFs results in amplification that is limited to the spectral range of 2045-2130 nm. Therefore, a penalty of 45 nm can be avoided at the expense of using the OBPFs between different stages of MOPA system. This flexible MOPA system can be used in multiple applications, especially for space-borne high power transmitters operating in atmospheric transmission windows.

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Section: Introductionmentioning

confidence: 99%

Modeling and analysis of single-mode widely tunable all-fiber Ho-doped CW master oscillator power amplifier system

Mirza,

Salaria,

Ghafoor

et al. 2024

Phys. Scr.

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“…-SWITCHED Holmium (Ho) lasers are attractive in a variety of applications, such as lidar, surgeries and material processing [1]- [3], which are also the ideal pump sources for non-linear frequency conversion toward 3~14 μm via supercontinuum generation [4] and optical parameter oscillation [5]. Due to the lack of absorption band at 800 nm, Q-switched Ho lasers are mainly pumped by the Thulium (Tm) lasers and 1.9 μm diode lasers (LDs) [6], [7], especially in a MOPA structure with several well-developed high-power Tm lasers [8]. As additional layout for the Tm laser should be prepared for cascade pumping, compactness and accessibility of the pulsed Ho laser are limited [9].…”

Section: Introductionmentioning

confidence: 99%

Passively Q-Switched Integrated Tm: YAG/Ho:YAP Laser

et al. 2022

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“…In-band pumping of the unsensitized Ho-doped gain medium with 1.9 μm lasers had become a dominant way to achieve pulse operation at 2.1 μm for the past two decades [8]- [10], as the traditional Tm, Ho co-doped mechanism had severe upconversion losses at room temperature [11], [12].…”

Section: Introductionmentioning

confidence: 99%

Actively Q-Switching in the Intra-Cavity Pumping Mechanism for Polarized Oscillation at 2.1 μm

Huang

Yan

et al. 2020

IEEE Access

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Q-switched and polarized Ho lasers are the ideal driving source for mid-infrared radiation via optical parametric oscillation. Although intra-cavity pumping is an efficient way to achieve the Ho laser oscillation at 2.1 μm, which also facilitates the direct use of common diodes in a compact structure, it was demonstrated to be not suitable for Q-switching due to the saturable effect of the Ho-doped gain medium. Here, we report a RbTiOPO 4 Q-switched intra-cavity pumped laser via integrating the Tm-doped and Hodoped gain medium into a composite structure and decoupling the Tm laser from the Ho laser before it was modulated by the RbTiOPO 4 crystal. The shortest pulse of 41 ns at repetition frequency of 1 kHz was obtained with a peak power of 7.5 kW. By competing with the intensified self-pulsing, the maximum pulse repetition frequency was found to reach 7 kHz, which was half the driving frequency of the electro-optical modulator. The results pave the way for achieving regular pulses from the intra-cavity pumping mechanism, which facilities a compact, accessible and robust pulse source at 2.1 μm.

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High Power Ho:YAP Laser With 107 W of Output Power at 2117 nm

Cited by 14 publications

References 24 publications

Modeling and analysis of single-mode widely tunable all-fiber Ho-doped CW master oscillator power amplifier system

Modeling and analysis of single-mode widely tunable all-fiber Ho-doped CW master oscillator power amplifier system

Passively Q-Switched Integrated Tm: YAG/Ho:YAP Laser

Actively Q-Switching in the Intra-Cavity Pumping Mechanism for Polarized Oscillation at 2.1 μm

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