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optical parametric oscillator Based on All-optical Poled Silicon Nitride

IEEE ACCESS 2023年 11卷 69965-69970页

作者： Chen, Shiyi Yin, Ming Luo, Yongzhi Lin, Xiyue Chengdu Univ Technol Sch Mech & Elect Engn Chengdu 610059 Peoples R China Chengdu Univ Technol Sch Ind Technol Yibin 644000 Peoples R China

Quasi-phase matching optical parametric oscillators (OPOs) are widely used for mid-infrared laser generation. However, the traditional OPO bulk material using high voltage electric field poling limits the flexibility of the poling period. In this paper, we propose a novel OPO design based on all-optical poled silicon nitride, allowing for adjustable poling period. Two OPO design schemes are presented, each offering unique advantages in terms of operational characteristics and performance. The output characteristics of the OPO are investigated in three modes: OPO pump tuning, poling fundamental wave (PFW) tuning, and OPO pump tuning and PFW tuning with the same laser. For OPO pump tuning, the OPO achieves output wavelengths of 3.319-5.265 mu m and 2.225-3.769 mu m with PFW wavelengths of 1450 nm and 1700 nm. For PFW tuning, the OPO produces output wavelengths of 5.502-3.722 mu m and 5.497-3.577 mu m using OPO pump wavelengths of 1310 nm and 1654 nm, respectively. Furthermore, for OPO pump tuning and PFW tuning with the same laser, the OPO generates output wavelengths ranging from 5.504 mu m to 3.941 mu m with OPO pump and PFW wavelengths ranging from 1.420 mu m to 1.610 mu m. This new OPO design offers enhanced flexibility in controlling the poling period for efficient mid-infrared laser generation.

关键词： optical parametric oscillator periodically poled silicon nitride optical frequency conversion infrared

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A high-energy, long-wave infrared laser based on ZnGeP2 optical parametric oscillator and amplifier

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INFRARED PHYSICS & TECHNOLOGY 2025年 145卷

作者： Wang, Hai Hu, Liemao Liu, Yu Li, Zhiyong Xie, Zhenzhen Li, Hui Tian, Juntao Wang, Guochang Wang, Ziming Duan, Bozheng Tan, Rongqing Chinese Acad Sci Aerosp Informat Res Inst Laser Engn Ctr Beijing 100094 Peoples R China Univ Chinese Acad Sci Sch Elect Elect & Commun Engn Beijing 101408 Peoples R China Beijing Inst Space Mech & Electcity Key Lab Space Laser Informat Percept Technol CAST Beijing 100094 Peoples R China Chinese Acad Sci Inst Semicond Lab Solid State Optoelect Informat Technol Beijing 100083 Peoples R China

This paper reports on a high-energy, long-wave infrared source that is pumped using two individual Ho: YLF lasers, which presents an effective approach to improving the energy and peak power of the long-wave laser. A 7.23-mJ nanosecond pulse at 8.027 mu m was achieved using a ZnGeP2 optical parametric oscillator and amplifier (OPO + OPA) system. The optical conversion efficiency of the system was 7.8 %, achieved with a total pump energy of 92.15 mJ. The ZnGeP2 OPO provided an output energy of 2.68 mJ, accompanied by a pulse duration of 12.4 ns. Furthermore, the pulse energy was boosted to 7.23 mJ after optical parametric amplification, resulting in a peak power increase to 0.58 MW. The amplified long-wave laser has a linewidth of 86.26 nm, and M-2 factors of 3.44 in the x direction and 2.94 in the y direction.

关键词： optical parametric oscillator optical parametric amplifier Solid-state laser ZnGeP(2 )crystal Ho: YLF laser

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Efficient long-wave infrared ZGP optical parametric oscillator pumped by a diode-pumped AO Q-switched Ho:YAG laser

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FRONTIERS IN PHYSICS 2024年 12卷

作者： Hou, Zuoxun Yang, Song Zheng, Guoxian Beijing Inst Space Mech & Elect Beijing Peoples R China

We describe an efficient long-wave infrared optical parametric oscillator based on ZnGeP2 crystal pumped by a diode-pumped AO Q-switched Ho:YAG laser in this paper. The wavelength of the laser pulse generated by Ho:YAG laser is 2.09-mu m, and the maximum output average power is 25.3 W at repetition rate of 10 kHz. When pumped by such Ho:YAG laser, the maximum average output power of 0.66 W at 9.8 mu m is achieved, corresponding to slope efficiency of 5.0% and optical efficiency of 2.6%. Furthermore, the beam quality factor of the long-wave infrared beam is measured to be approximately 1.3. To the authors' best knowledge, this is the best performance reported for a long-wave infrared ZGP-OPO pumped by a diode-pumped AO Q-switched Ho:YAG laser.

关键词： long-wave infrare optical parametric oscillator Ho:YAG diode-pumped lasers AO Q-switched

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Tripartite entanglement in a detuned non-degenerate optical parametric oscillator

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JOURNAL OF OPTICS 2024年第7期26卷 075201-075201页

作者： Guo, Jun Tian, Jianfeng Sun, Hengxin Taiyuan Normal Univ Dept Phys Jinzhong 030619 Peoples R China Shanxi Univ Inst Optoelect State Key Lab Quantum Opt & Quantum Opt Devices Taiyuan Peoples R China

Continuous variable multipartite entanglement is an important resource in quantum optics and quantum information. Non-degenerate optical parametric oscillator (NOPO), generally working in a resonant regime, can generate high quality tripartite entanglement. However, the detuning in a real experiment is inevitable and sometimes necessary, for instance, in an optomechanical system. We calculate the tripartite entanglement from a detuned triply quasi-resonant NOPO. Unlike the previous literature using inseparability criterion, we use the positivity of partial transpose, a sufficient and necessary criterion, to characterize the tripartite entanglement with full inseparability generated from a detuned NOPO. We also consider the influence of the pump and signal/idler losses on the tripartite entanglement. The results show that, the tripartite entanglement could exist even with a large detuning of several times cavity linewidth, and may be better for a detuned regime than for the resonant one under some conditions. With a fixed non-zero loss which always exists in a real experiment, an appropriate value of non-zero detuning could lead to the best entanglement. What's more, unlike the bipartite entanglement, which exists both below and above threshold, the tripartite entanglement only occurs for a nonzero classical amplitude of signal/idler field. The jumping between the tripartite and bipartite entanglement could make the NOPO become a quantum state switch element, which promises a potential application on the multiparty quantum secret sharing.

关键词： tripartite entanglement optical parametric oscillator detuned the positivity of partial transpose

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Delayed optical feedback-regulated artificial soliton molecule in a femtosecond optical parametric oscillator

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PhotoniX 2024年第1期5卷 34-53页

作者： Yu Cai Jintao Fan Fanchao Meng Youjian Song Minglie Hu Ultrafast Laser Laboratory State Key Laboratory of Precision Measurement Technology and InstrumentsTianjin UniversityTianjin 300072China Ultrafast Laser Laboratory College of Precision Instrument and Optoelectronics EngineeringTianjin UniversityTianjin 300072China State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China

Soliton molecules(SMs)play a crucial role in nonlinear optical systems,enriching our understanding of nonlinear science through the study of their interaction *** passively mode-locked fiber lasers offer an efficient platform for generating diverse types of SMs,the complex internal dynamics of the laser often pose challenges in achieving predetermined temporal separations between ***,we implement a delayed optical feedback technique within a femtosecond optical parametric oscillator,enabling the generation of SMs with precise and controllable temporal separations.A theoretical model,which models the intracavity iterations of the signal with a simplified Ikeda map,is proposed to study the impact of parametric gain,intracavity feedback delay,and cavity length on the internal separations of the *** experimental results confirm that adjusting the cavity length allows for producing desired temporal separations within *** reveal the evolution dynamics of the SMs,we further develop a rigorous numerical model using the carrier-resolved Forward Maxwell Equation,which is capable of modeling ultra-broadband complex dynamics based on a single equation without relying on the slowly-varying envelope *** numerical model unveils the rich formation dynamics of the SMs at various separations,which confirms the critical role of the gain window provided by the *** work opens up new opportunities for the on-demand generation of SMs and provides valuable insights into the complex dynamics in femtosecond optical parametric oscillator systems with optical delayed feedback.

关键词： Soliton molecule Femtosecond optical parametric oscillator Delayed optical feedback

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1064 nm laser pumped optical parametric oscillator based on BaGa4Se7 crystal at 1 kHz repetition rate

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OPTICS AND LASER TECHNOLOGY 2024年 171卷

作者： Chen, Kai Xu, Degang Sun, Yue Li, Jining Yan, Chao Liu, Shuai Wang, Yuye Zhong, Kai Yao, Jiyong Yao, Jianquan Tianjin Univ Inst Laser & Optoelect Sch Precis Instrument & Optoelect Engn Tianjin 300072 Peoples R China Tianjin Univ Key Lab Optoelect Informat Technol Minist Educ Tianjin 300072 Peoples R China Tianjin Univ Key Lab Micro Optoelectro Mech Syst Technol Minist Educ Tianjin 300072 Peoples R China Chinese Acad Sci Beijing Ctr Crystal Res & Dev Key Lab Funct Crystals & Laser Technol Tech Inst Phys & Chem Beijing 100190 Peoples R China

In this work, a tunable mid-infrared optical parametric oscillator based on type I phase-matching BaGa4Se7 was demonstrated. Using a Nd:YAG master oscillator power amplifier system as pump source, we firstly achieve the 1064 nm pumped BGSe-OPO at 1 kHz repetition rate. With pump double-pass single resonant oscillator configuration, the maximum output power at 4.18 jim was 483 mW and the corresponding conversion efficiency is 8.78 %. Both temperature and angle tuning of BGSe-OPO were studied and widely tunable output in the range of 3.36-5.16 jim was obtained. The average power fluctuation measured within 30 min was 0.98 % root mean square. This study has unveiled the great potential of BGSe crystal in highly stable, widely tunable, high repetition rate mid-infrared pulse generation.

关键词： Mid-infrared generation BaGa 4 Se 7 optical parametric oscillator

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High-Power KTiOAsO4 optical parametric oscillator at 300 Hz

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PHOTONICS 2025年第3期12卷 270-270页

作者： Li, Tao Meng, Jun Liu, Gaoyou Liu, Zhaojun Shandong Univ Sch Informat Sci & Engn Minist Educ Qingdao 266237 Peoples R China Shandong Univ Key Lab Laser & Infrared Syst Minist Educ Qingdao 266237 Peoples R China Shandong Univ Shandong Prov Key Lab Laser Technol & Applicat Qingdao 266237 Peoples R China

A high-power and high-repetition KTiOAsO4 (KTA) optical parametric oscillator (OPO) was established in this study, with the adoption of plane-parallel and ring cavities. The pump was a high-power Nd:YAG master oscillator power amplifier (MOPA) system with a pulse repetition frequency (PRF) of 300 Hz, and the corresponding beam quality factors were Mx2 = 3.4 and My2 = 3.2. In the plane-parallel cavity experiment, powers of 51.1 W (170 mJ) and 15.9 W (53 mJ) in the signal and idler were obtained, respectively. In terms of the average power of 1 mu m of a pumped KTA OPO, to our knowledge, this is the highest average power for KTA OPO. The ring cavity was constructed to achieve lasers with both high power and beam quality. The output powers of the ring cavities for the signal and idler were 33.9 W (113 mJ) and 8.7 W (29 mJ), respectively, and the corresponding beam quality factors of the signal were Mx2 = 5.3 and My2 = 7.9. The 300 Hz 100 mJ class 1.54 mu m laser with a beam quality factor of less than 10 is an ideal eye-safe light detection and ranging (LiDAR) source.

关键词： optical parametric oscillator high repetition high power KTA OPO

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Pump-enhanced, continuous-wave, narrow linewidth optical parametric oscillator at 2.9-3.6 μm based on a fan-out PPLN

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OPTICS COMMUNICATIONS 2025年 577卷

作者： Zhao, Gang Li, Chen Meng, Jun Liu, Gaoyou Zhao, Zhigang Liu, Zhaojun Shandong Univ Sch Informat Sci & Engn Qingdao 266237 Peoples R China Shandong Prov Key Lab Laser Technol & Applicat Qingdao 266237 Peoples R China Shandong Univ Minist Educ Key Lab Laser & Infrared Syst Qingdao 266237 Peoples R China

Based on a fan-out grating periodically poled lithium niobate (PPLN), a high efficiency, continuous-wave, narrow linewidth, pump-enhanced optical parametric oscillator (OPO) was demonstrated. This OPO exhibited a broad tuning range of 2890-3574 nm, attributable to the unique properties of the fan-out grating PPLN crystal. The OPO achieved over 3 W output power across 2956-3525 nm, due to pump-enhancement technology and an optimized input coupler, whose transmissivity was optimized based on the efficiency on the tuning range. The maximum output power was 4.06 W at 3014 nm. The signal light was employed for locking, resulting in a standard deviation of idler output power of 0.8% over a duration of 30 min. The linewidth of the idler was measured and estimated to be less than 665 kHz. At the maximum output power at 3238 nm, the M2 factors were determined to be 1.25 and 1.33 in the x and y directions, respectively.

关键词： Pump-enhanced optical parametric oscillator Fan-out grating PPLN Narrow linewidth Mid-infrared

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Tunable blue-green vortex pulse laser emitting from an optical parametric oscillator

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OPTICS COMMUNICATIONS 2025年 575卷

作者： Luo, Qihui Ma, Jian Chen, Yilan Lu, Tingting Zhang, Junxuan Ma, Haoda Zhu, Xiaolei Chinese Acad Sci Shanghai Inst Opt & Fine Mech Key Lab Space Laser Commun & Detect Technol 390 Qinghe Rd Shanghai 201800 Peoples R China Univ Chinese Acad Sci Ctr Mat Sci & Optoelect Engn Beijing 100049 Peoples R China Jiangsu Univ Sci & Technol Coll Automat Zhenjiang 212114 Jiangsu Peoples R China Chinese Acad Sci Shanghai Inst Opt & Fine Mech Aerosp Laser Technol & Syst Dept Shanghai 201800 Peoples R China

A tunable blue-green vortex laser within a spectrum range of 476 nm-525 nm was firstly demonstrated from a (3-Ba2BO4 (BBO) optical parametric oscillator (OPO), pumped by 355 nm vortex pulsed laser operating at 100 Hz repetition rate. The maximum output signal vortex pulse energy of 0.55 mJ at 495 nm wavelength was obtained, corresponding to a conversion efficiency of 14.2%. The transformation process of signal laser from a vortex beam to a Gaussian beam was illustrated by changing the curvature radius of the output mirror.

关键词： optical vortex Blue-green laser optical parametric oscillator Wavelength tuning

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Compact 2-μm Hundred Hertz optical parametric oscillator Based on KTP crystal

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INFRARED PHYSICS & TECHNOLOGY 2024年 142卷

作者： Zhao, Chenjie Yu, Yu Yu, Hengzhe Yin, Jian Cao, Chen Dang, Qifan Yue, Jianfeng Li, Kai Li, Yunfei Wang, Yulei Lu, Zhiwei Hebei Univ Technol Ctr Adv Laser Technol Tianjin 300401 Peoples R China Hebei Key Lab Adv Laser Technol & Equipment Tianjin 300401 Peoples R China

A 100 Hz compact 2 mu m optical parametric oscillator (OPO) based on a type II non-critically phase-matched KTiOPO4 crystal (KTP) was reported. The monolithic KTP crystal was pumped with a passively Q-switched 1064 nm Nd:YAG laser. At a repetition rate of 100 Hz and a single pulse energy of 5.8 mJ of pump light, a 2128-nm laser output was achieved with a maximum of 1.17 mJ of parametric light at the degenerate point, with a parametric light pulse width of approximately 10.5 ns, corresponding to a pump to parametric light conversion efficiency of 20.1 %.

关键词： optical parametric oscillator 2 mu m laser KTP crystals

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