High-power 355 nm ultraviolet lasers operating at ultrahigh repetition rate

Chen, H; Liu, Q; Yan, Pin; Gong, Mali

doi:10.1088/1612-2011/10/2/025401

Cited by 9 publications

(5 citation statements)

References 18 publications

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“…Recently 43.7 W at 400 kHz has been reported with ∼41.6% conversion efficiency [9]. However, challenges such as complicated optics, stable resonators, pump energy delivery and thermal management are unavoidable during scale-up which result in high system costs.…”

mentioning

confidence: 99%

Comparison Between Single Shot Micromachining of Silicon With Nanosecond Pulse Shaped IR Fiber Laser and DPSS UV Laser

Sparkes

O’Neill

2014

IEEE J. Select. Topics Quantum Electron.

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High power DPSS UV lasers having high repetition rates (>100 kHz) are significant part of the cost of a laser Si microprocessing system. An alternative inexpensive solution, MOPA based IR fiber lasers, have been used to machine Si with high energy shaped pulses. This investigation evaluates the single pulse machining performance of a pulse shapeable IR (1062 nm) fiber laser and a DPSS UV (355 nm) laser on Si substrates and directly compares their performance. The machined depth data was measured with a white light interferometer and the finishing quality examined for surface defects with a SEM. Theoretical analysis demonstrated rapid heating effects by taking account of the dynamic optical and thermal properties of Si for given IR laser shaped pulses. The results show that high quality Si surface micro-processing can benefit from using the more flexible, more reliable, and pulse shapeable IR fiber laser at high repetition rates which no conventional solid state IR or UV laser could achieve.

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confidence: 99%

Comparison Between Single Shot Micromachining of Silicon With Nanosecond Pulse Shaped IR Fiber Laser and DPSS UV Laser

Sparkes

O’Neill

2014

IEEE J. Select. Topics Quantum Electron.

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“…Then in 2010, a 35.1 W average power was reached by Yan et al, with a repetition rate to be 70 kHz and a pulse duration of 15 ns. To date, the maximum average power of these lasers can reach up to 43.7 W working at 400 kHz PRF [1].…”

Section: Introductionmentioning

confidence: 99%

Design of High Energy Single Longitudinal Mode 355 nm UV Laser

Chen²,

Zhang³

2023

J. Phys.: Conf. Ser.

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355 nm laser is a widely applied light source, of which the two features mostly used are the damaging effect and propagation characteristic in the atmosphere. Thus, higher laser energy has always been required to perform better damage and provide further propagation range. We demonstrate high energy single longitudinal ultraviolet (UV) laser using a nonlinear optical crystal of lithium triborate (LBO) cut at θ=90° and φ= 37° with sizes of 10 mm × 10 mm × 30 mm in type I phase-matching, the source light from a single longitudinal mode (SLG) inject master oscillator power amplifier (MOPA) operated at a repetition rate of 5 Hz with a pulse duration of 10 ns. The maximum output energy of 0.308 J of 355 nm UV laser was reached through a total pump energy of 1.82 J 1064 nm and 532 nm laser with an nonlinear conversion efficiency of 16.9%. The experimental results prove that the LBO crystal is a reliable candidate for high-energy UV laser generation. The output high energy 355 nm laser has great application potential in material processing, microchip manufacturing and remote sensing.

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“…Subsequently, cascaded cavity SHG and SFG techniques were employed, resulting in an average output power of 12 W for 355 nm UV lasers with an optical-to-optical conversion efficiency of 11.5%. Then, researchers continuously increased the output power of the fundamental 1064 nm laser, adopted novel nonlinear optical crystals, and utilized laser amplification techniques to optimize Gaussian beam waist radius and waist length [3][4][5][6][7] , achieving higher power and efficiency for 355 nm UV laser output. In 2012, Zhang [8] designed a 355nm UV laser, which employing two harmonic mirrors to enhance the conversion efficiency, resulting in a maximum power of 7.8 W, corresponding to 808 nm pump-to-UV conversion efficiency of 4.3%.…”

Section: Introductionmentioning

confidence: 99%

Study on the efficiency improvement of side-pumped all-solid-state ultraviolet lasers

Lin,

Fan,

Peng

et al. 2023

Fourteenth International Conference on Information Optics and Photonics (CIOP 2023)

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High-power 355 nm ultraviolet lasers operating at ultrahigh repetition rate

Cited by 9 publications

References 18 publications

Comparison Between Single Shot Micromachining of Silicon With Nanosecond Pulse Shaped IR Fiber Laser and DPSS UV Laser

Comparison Between Single Shot Micromachining of Silicon With Nanosecond Pulse Shaped IR Fiber Laser and DPSS UV Laser

Design of High Energy Single Longitudinal Mode 355 nm UV Laser

Study on the efficiency improvement of side-pumped all-solid-state ultraviolet lasers

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