Robust, Efficient, Optical-Damage-Resistant, 200 mJ Nanosecond Ultraviolet Light Source for Satellite-Based Lidar Applications

2005 ◽  
Vol 883 ◽  
Author(s):  
Darrell J. Armstrong ◽  
Arlee V. Smith
Keyword(s):  
Second Harmonic ◽  
Beam Quality ◽  
High Energy ◽  
Nonlinear Frequency ◽  
Sound Design ◽  
Optical Efficiency ◽  
Optical Damage ◽  
Parametric Oscillators ◽  
Frequency Converters ◽  
Near Ir

AbstractConventional wisdom contends that high-energy nanosecond UV laser sources operate near the optical damage thresholds of their constituent materials. This notion is particularly true for nonlinear frequency converters like optical parametric oscillators, where poor beam quality combined with high intra-cavity fluence leads to catastrophic failure of crystals and optical coatings. The collective disappointment of many researchers supports this contention. However, we're challenging this frustrating paradigm by developing high-energy nanosecondUVsources that are efficient, mechanically robust, and most important, resistant to optical damage. Based on sound design principles developed through numerical modeling and rigorous laboratory testing, our sources generate 8-10 ns 190 mJ pulses at 320 nm with fluences≤ 1 J/cm2. Using the second harmonic of a Q-switched, injection-seeded Nd:YAGlaser as the pump source, we convert the near-IR Nd:YAG fundamental to UV with optical-to-optical efficiency exceeding 21%.

scholarly journals High-efficiency 50 W burst-mode hundred picosecond green laser

2020 ◽  
Vol 8 ◽  
Author(s):  
Ning Ma ◽  
Meng Chen ◽  
Ce Yang ◽  
Shang Lu ◽  
Xie Zhang ◽  
...  
Keyword(s):  
Near Infrared ◽  
High Efficiency ◽  
Second Harmonic ◽  
Beam Quality ◽  
Average Power ◽  
High Energy ◽  
Green Laser ◽  
Type I ◽  
Regenerative Amplifier ◽  
Burst Mode

We report high-energy, high-efficiency second harmonic generation in a near-infrared all-solid-state burst-mode picosecond laser at a repetition rate of 1 kHz with four pulses per burst using a type-I noncritical phase-matching lithium triborate crystal. The pulses in each burst have the same time delay ( ${\sim}1~\text{ns}$ ), the same pulse duration ( ${\sim}100~\text{ps}$ ) and different relative amplitudes that can be adjusted separately. A mode-locked beam from a semiconductor saturable absorber mirror is pulse-stretched, split into seed pulses and injected into a Nd:YAG regenerative amplifier. After the beam is reshaped by aspheric lenses, a two-stage master oscillator power amplifier and 4f imaging systems are applied to obtain a high power of ${\sim}100~\text{W}$ . The 532 nm green laser has a maximum conversion efficiency of 68%, an average power of up to 50 W and a beam quality factor $M^{2}$ of 3.5.

scholarly journals Channel Waveguides in Lithium Niobate and Lithium Tantalate

2020 ◽  
Author(s):  
Yi Lu ◽  
Benjamin Johnston ◽  
Peter Dekker ◽  
Michael Withford ◽  
Judith M. Dawes
Keyword(s):  
Liquid Phase ◽  
Lithium Niobate ◽  
Liquid Phase Epitaxy ◽  
Second Harmonic ◽  
Lithium Tantalate ◽  
Nonlinear Frequency ◽  
Low Loss ◽  
Frequency Converters ◽  
Channel Waveguides ◽  
Photonic Waveguides

Low-loss photonic waveguides in lithium niobate offer versatile functionality as nonlinear frequency converters, switches, and modulators for integrated optics. Combining the flexibility of laser processing with liquid phase epitaxy we have fabricated and characterized lithium niobate channel waveguides on lithium niobate and lithium tantalate. We used liquid phase epitaxy with K2O flux on laser-machined lithium niobate and lithium tantalate substrates. The laser-driven rapid-prototyping technique can be programmed to give machined features of various sizes, and liquid phase epitaxy produces high quality single-crystal, lithium niobate channels. The surface roughness of the lithium niobate channels on a lithium tantalate substrate was measured to be 90 nm. The lithium niobate channel waveguides exhibit propagation losses of 0.26 ± 0.04 dB/mm at a wavelength of 633 nm. Second harmonic generation at 980 nm was demonstrated using the channel waveguides, indicating that these waveguides retain their nonlinear optical properties.

scholarly journals Channel Waveguides in Lithium Niobate and Lithium Tantalate

Molecules ◽  
2020 ◽  
Vol 25 (17) ◽  
pp. 3925
Author(s):  
Yi Lu ◽  
Benjamin Johnston ◽  
Peter Dekker ◽  
Michael J. Withford ◽  
Judith M. Dawes
Keyword(s):  
Liquid Phase ◽  
Lithium Niobate ◽  
Liquid Phase Epitaxy ◽  
Second Harmonic ◽  
Lithium Tantalate ◽  
Nonlinear Frequency ◽  
Low Loss ◽  
Frequency Converters ◽  
Channel Waveguides ◽  
Photonic Waveguides

Low-loss photonic waveguides in lithium niobate offer versatile functionality as nonlinear frequency converters, switches, and modulators for integrated optics. Combining the flexibility of laser processing with liquid phase epitaxy we have fabricated and characterized lithium niobate channel waveguides on lithium niobate and lithium tantalate. We used liquid phase epitaxy with K2O flux on laser-machined lithium niobate and lithium tantalate substrates. The laser-driven rapid-prototyping technique can be programmed to give machined features of various sizes, and liquid phase epitaxy produces high quality single-crystal, lithium niobate channels. The surface roughness of the lithium niobate channels on a lithium tantalate substrate was measured to be 90 nm. The lithium niobate channel waveguides exhibit propagation losses of 0.26 ± 0.04 dB/mm at a wavelength of 633 nm. Second harmonic generation at 980 nm was demonstrated using the channel waveguides, indicating that these waveguides retain their nonlinear optical properties.

scholarly journals Modelling Dispersion Compensation in a Cascaded-Fiber-Feedback Optical Parametric Oscillator

Optics ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 96-102
Author(s):  
Ewan Allan ◽  
Craig Ballantine ◽  
Sebastian C. Robarts ◽  
David Bajek ◽  
Richard A. McCracken
Keyword(s):  
Pulse Propagation ◽  
Dispersion Compensation ◽  
Numerical Aperture ◽  
Tunable Laser ◽  
High Energy ◽  
Order Effects ◽  
Optical Parametric Oscillators ◽  
Fiber System ◽  
Parametric Oscillators ◽  
Optical Parametric

Fiber-feedback optical parametric oscillators (OPOs) incorporate intracavity fibers to provide a compact high-energy wavelength-tunable laser platform; however, dispersive effects can limit operation to the sub-picosecond regime. In this research article, we modeled pulse propagation through systems of cascaded fibers, incorporating SMF-28 and ultra-high numerical aperture (UHNA) fibers with complementary second-order dispersion coefficients. We found that the pulse duration upon exiting the fiber system is dominated by uncompensated third-order effects, with UHNA7 presenting the best opportunity to realise a cascaded-fiber-feedback OPO.

High-energy, sub-30 fs near-IR pulses from a broadband optical parametric amplifier based on collinear interaction in BiB_3O_6

2009 ◽  
Vol 34 (5) ◽  
pp. 689 ◽  
Author(s):  
M. Ghotbi ◽  
M. Beutler ◽  
V. Petrov ◽  
A. Gaydardzhiev ◽  
F. Noack
Keyword(s):  
High Energy ◽  
Parametric Amplifier ◽  
Optical Parametric Amplifier ◽  
Near Ir ◽  
Optical Parametric

scholarly journals Nonlinear wavefront engineering with metasurface decorated quartz crystal

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ningbin Mao ◽  
Yutao Tang ◽  
Mingke Jin ◽  
Guanqing Zhang ◽  
Yang Li ◽  
...  
Keyword(s):  
Quartz Crystal ◽  
Second Harmonic ◽  
Super Resolution ◽  
Optical Efficiency ◽  
The Past ◽  
Nonlinear Photonic Crystals ◽  
Resolution Imaging ◽  
Wavefront Shaping ◽  
Hybrid Platform ◽  
Light Generation

Abstract In linear optical processes, compact and effective wavefront shaping techniques have been developed with the artificially engineered materials and devices in the past decades. Recently, wavefront shaping of light at newly generated frequencies was also demonstrated using nonlinear photonic crystals and metasurfaces. However, the nonlinear wave-shaping devices with both high nonlinear optical efficiency and high wave shaping efficiency are difficult to realize. To circumvent this constraint, we propose the idea of metasurface decorated optical crystal to take the best aspects of both traditional nonlinear crystals and photonic metasurfaces. In the proof-of-concept experiment, we show that a silicon nitride metasurface decorated quartz crystal can be used for the wavefront shaping of the second harmonic waves generated in quartz. With this crystal-metasurface hybrid platform, the nonlinear vortex beam generation and nonlinear holography were successfully demonstrated. The proposed methodology may have important applications in nonlinear structured light generation, super-resolution imaging, and optical information processing, etc.

Optical fibre beam delivery of high-energy laser pulses: beam quality preservation and fibre end-preparation

2000 ◽  
Vol 34 (4-6) ◽  
pp. 273-288 ◽  
Author(s):  
A. Kuhn ◽  
I.J. Blewett ◽  
D.P. Hand ◽  
P. French ◽  
M. Richmond ◽  
...  
Keyword(s):  
Optical Fibre ◽  
Beam Quality ◽  
Laser Pulses ◽  
High Energy ◽  
Energy Laser ◽  
High Energy Laser ◽  
Beam Delivery

Preparation of fiber optics for the delivery of high-energy high-beam-quality Nd:YAG laser pulses

2000 ◽  
Vol 39 (33) ◽  
pp. 6136 ◽  
Author(s):  
Andreas Kuhn ◽  
Paul French ◽  
Duncan P. Hand ◽  
Ian J. Blewett ◽  
Mark Richmond ◽  
...  
Keyword(s):  
Fiber Optics ◽  
Nd:Yag Laser ◽  
Beam Quality ◽  
Laser Pulses ◽  
High Energy ◽  
High Beam ◽  
High Beam Quality
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