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The use of laser direct-write (LDW) in advanced manufacturing processes is on the increase. This paper will review current industrial applications of LDW worldwide, and discuss the future prospects for LDW technologies.
Spectral mapping of the polarization correlations of photon pairs from down-conversion in femtosecond regime reveals an imbalance between contributions from the two possible decay paths as the cause of low entanglement quality.
Parametric downconversion in KDP provides a method of producing heralded single photons in pure states.We present the theory behind this technique and our most recent experimental results.
We consider collinear downconversion in a type-1 configuration with degeneracy near the crystal??s zero group-velocity dispersion frequency. A fractional frequency bandwidth of 0.53 is observed, corresponding to a 1080nm range about the 1885nm degenerate wavelength.
We demonstrate the electrostatic surface guiding of cold heavy-water (D2O) molecules by using a 2D hollow electrostatic field generated by the combination of two parallel charged-poles and a grounded metal-plate.
We report the first experimental demonstration of back-action cancellation of radiation pressure, with a setup based upon a high-finesse optical cavity with movable mirrors. Further improvement will allow to probe quantum effects of radiation pressure.
Considerable increase of the photoinduced resistivity changes was found in Bi0.4Ca0.6MnO3 thin films after depositing gold nanoparticles on the surface due to resonant enhancement of local electromagnetic field in the vicinity of the gold nanoparticles.
We use photoassociation of ultracold atoms to produce ultracold KRb molecules in high vibrational levels of the ground state. Depletion spectroscopy is employed to detect these molecules with both vibrational and rotational resolution.
We report on continuous-wave 532-nm Nd:YVO4 thin-disk lasers with output powers of 6.4 W and 4.4 W with pumping at 808 nm and 880 nm, respectively. Also, deep-blue emission in the watt regime was achieved from Nd-doped vanadates.
A diode-pumped, 100 mJ/pulse, Nd:YAG oscillator employing a dual pump head design aligned orthogonally in an unstable resonator configuration producing aperture-free TEM00 beams is presented.
The design of a diode pumped, injection seeded MOPA with a transform limited line width and diffraction limited beam quality is presented. This lidar transmitter produces over 300mJ energy at 10 Hz repetition rate.
We measured thermal conductivity, thermal expansion coefficient, and thermal refractive index coefficient of Nd:GdVO4 and Nd:YVO4. Superiority comparisons of laser media under high power laser operations were also discussed from the viewpoints of thermal characteristics.
We demonstrated reciprocating optical modulation with Er-doped LiNbO3 for highorder sideband generation, where reciprocating modulation process can be selectively amplified. The sideband component of 50 GHz was successfully enhanced. The gain was 8 dB.
A master oscillator power amplifier (MOPA) generates chirped 3ps pulses at 920nm with a repetition rate of 4GHz. Without requiring CPA the pulses are compressed to 600fs with a peak power of up to 65W.
We theoretically predict and experimentally demonstrate new types of gap solitons in 2D photonic lattices such as dipole-array gap solitons. These solitons bifurcate from a superposition of Bloch modes at edges of higher Bloch bands.
We develop a simple physical model to describe narrow-band enhancement of spectrally filtered ultrashort pulses in the presence of self-phase modulation. An experiment using pulse shaping and propagation in photonic crystal fibre confirms this model.
We demonstrate the application of importance sampling to Monte Carlo simulations of an actively mode-locked laser model. The method computes the probability of errors due to both amplitude drop-outs and pulse position shifts.
Gain filtering of higher-order modes in large-mode-area fibers is an extremely robust method for providing diffraction-limited performance regardless of core diameter or input-beam quality. These predictions extend to 100-??m cores to the 10-kW level.
A Neodymium doped LMA fiber is locked with a volume Bragg grating for the first time, and compared to a conventional fiber laser setup. The efficiency is improved and the linewidth is drastically reduced.
We study experimentally the propagation and collision of two orthogonally polarized solitons in a weakly-birefringent photonic crystal fiber. The collision occurs at a particular power and initiates energy transfer between the colliding solitons.
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