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Article
Recent progress in the development of KBe2BO3F2: a deep-UV nonlinear optical crystal
This review mainly introduces in detail the progress of KBBF crystal over the last decade, with a full description of its crystal growth, new phase in hydrothermal growth, revised Sellmeier equations of the re...
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Article
Low-threshold-intensity 3.8-W continuous-wave Ti:Sapphire oscillator directly pumped with green diodes
For fiber-coupled green laser-diode pump beam, a simple model was proposed to calculate the average outputs. Then we presented a direct-pum** continuous-wave Ti:Sapphire laser producing an optimized output o...
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Article
Open AccessMosquito counting system based on optical sensing
Mosquitos, sometimes carrying deadly diseases such as malaria, zika, and dengue fever, cause much concern. To control mosquitos, it is important to effectively monitor their presence and behavioral trends. We ...
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Article
Investigation on the LIF spectrum superposition of gas-phase PAH mixtures at elevated temperatures: potential for the analysis of PAH LIF spectra in sooting flames
Laser-induced fluorescence (LIF) technique has been widely used to measure the polycyclic aromatic hydrocarbons (PAHs) in sooting flames, but the assignment of the LIF signals measured in flames to specific PA...
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Article
Measurement and extrapolation modeling of PAH laser-induced fluorescence spectra at elevated temperatures
The laser-induced fluorescence technique is widely used in the measurement of polycyclic aromatic hydrocarbons (PAHs) in sooting flames. One of the main limitations is the absence of the PAH fluorescence spect...
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Article
Thermal oxidation-resistant GeO2 ATR hollow waveguide based on NiCr capillary tube and its thermal effects
Transmission characteristics of a metallic tube GeO2 ATR hollow waveguide degenerate due to metal thermal oxidation caused by transmission, coupling and misalignment losses. NiCr has intrinsic resistance to therm...
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Article
Upconversion photon quantification of holmium and erbium ions in waveguide-adaptive germanate glasses
Visible upconversion photons have been quantified precisely in Ho3+/Yb3+ and Er3+/Yb3+ doped waveguide-adaptive aluminum germanate (NMAG) glasses, and effective red and green upconversion emissions generated from...
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Article
Lattice damage and waveguide properties of medium- and high-energy C3+ ions-irradiated LaAlO3 crystals
To investigate irradiation effects of LaAlO3 crystals, planar waveguides were fabricated via the medium- and high-energy C3+ ions irradiation. The characterizations of waveguides showed that irradiation at differ...
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Article
Generation of high power 200 mW laser radiation at 177.3 nm in KBe2BO3F2 crystal
With a newly developed diffusion-bonded KBe2BO3F2 prism-coupled device and by temperature stabilization of the device, we have achieved an average power of 200 mW at 177.3 nm through the sixth harmonic generation...
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Article
Near-infrared waveguide formation and RBS/channeling spectrometry analysis for damage in calcium barium niobate crystals via ion implantation
We report on the fabrication of planar waveguide structures in calcium barium niobate crystals via C ion implantation at room temperature. The SRIM code was applied to calculate damage profiles of the C ions i...
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Article
Optical planar waveguide in magnesium aluminate spinel crystal using oxygen ion implantation
A planar optical waveguide in MgAl2O4 crystal sample was fabricated using 6.0 MeV oxygen ion implantation at a fluence of 1.5 × 1015 ions/cm2 at room temperature. The optical modes were measured at a wavelength ...
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Article
A carbon monoxide detection device based on mid-infrared absorption spectroscopy at 4.6 μm
We present a differential carbon monoxide (CO) concentration sensing device using a self-fabricated spherical mirror (e.g., light collector) and a multi-pass gas chamber. Single-source dual-channel detection m...
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Article
A 110-TW multiple-beam laser system with a 5-TW wavelength-tunable auxiliary beam for versatile control of laser-plasma interaction
A Ti:sapphire laser system has been constructed with two synchronized main beams of 110 TW and 13 TW, and a 5-TW wavelength-tunable synchronized auxiliary beam for versatile control of laser-plasma interaction...
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Article
Generating self-accelerating Airy beams using a digital micromirror device
We report a new approach for generating an Airy beam by using a digital micromirror device (DMD) and a holographic technique where the DMD loads the desired hologram. Unique characteristics of an Airy beam, su...
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Article
Observation of multipulse bunches in a graphene oxide passively mode-locked ytterbium-doped fiber laser with all-normal dispersion
We give a systematic experimental study of multipulse bunches in a graphene oxide saturable absorber (GOSA) passively mode-locked all-normal dispersion ytterbium-doped fiber laser (YDFL). Some special phenome...
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Article
High-brightness optical-field-ionization collisional-excitation extreme-ultraviolet lasing pumped by a 100-TW laser system in an optically preformed plasma waveguide
Recent study on optical-field-ionization collisional-excitation extreme-ultraviolet lasing of Ni-like krypton at 32.8 nm pumped by a 100-TW laser system with an optically preformed plasma waveguide is reported...
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Article
Compression grating alignment by far-field monitoring
Slight non-parallelism of the gratings in the compressor of a chirped-pulse amplification laser system produces angular chirp which results in a significant reduction of the focused intensity due to elongation...
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Article
Continuous-wave high-power (320 mW) single mode operation of electronic vertically coupled InAs/GaAs quantum dot narrow-ridge-waveguide lasers
High-power 3 μm-wide narrow-ridge-waveguide lasers with ten stacks of electronic vertically coupled InAs/GaAs quantum dots in the active region were demonstrated. Unlike that from conventional uncoupled InAs q...
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Article
Optical manipulation of third-harmonic generation via either one- or two-photon excitation in diarylethene-polymethylmethacrylate polymer thin films
Optical manipulation of third harmonic (TH) generation in diarylethene-polymethylmethacrylate (DE-PMMA) polymer thin films is obtained by either one- or two-photon excitation. TH intensity generated from a DE-...
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Article
The development of new borate-based UV nonlinear optical crystals
The developments of nonlinear optical (NLO) crystals in the last decade are reviewed from two aspects. In the theoretical part, on the ab initio plane-wave pseudopotential energy method, calculation of the opt...