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2011 International Quantum Electronics Conference (IQEC) and Conference on Lasers and Electro-Optics (CLEO) Pacific Rim incorporating the Australasian Conference on Optics, Lasers and Spectroscopy and the Australian Conference on Optical Fibre Technology
We developed a novel nanocomposite consisting of an organic-inorganic hybrid polymer and gold ion nanoparticles. The nanocomposite has been proven to be suitable for functional three-dimensional nanostructure fabrication due to the fact that dominant formation of the nanoparticles is triggered in the post bake process after nanofabrication. The nanocomposite has high third-order nonlinearity due to...
Site-controlled In(Ga)As quantum dots (QD) were grown by molecular beam epitaxy on pre-patterned GaAs (001) substrates and integrated into optical resonators. The emission linewidth of single site-controlled QDs was probed using a standard micro-photoluminescence setup and exhibits values down to 38 μeV. We find a typical fine structure splitting of ∼32 μeV. Both values are comparable to self-assembled...
A study of the nanoscopic characteristics of photonic materials embedded with single emitting nanoparticles is presented. The method presented demonstrates the change in the photo luminescence trajectory of single emitters based on their location and/or separation from other single emitters within the material. Furthermore the work investigates the change in material properties and the functionality...
We report the two-photon luminescence emission (2PE) study of single indium phosphide (InP) semiconductor nanowire trapped in a gradient force optical tweezers. Nanowires studied were zinc blende, wurtzite or mixed phase crystal poly-types and ranged in length from 1 to 10 μm. Our results show that the band-edge emission from two-photon absorption of nanowires trapped in solution is strong and enhanced,...
An octave spanning spectrum is generated in an As2S3 taper via 77 pJ pulses from an ultrafast fiber laser. Chirp compensation allows the octave to be generated directly from the un-amplified laser output.
We report on two newly developed types of dispersive mirrors. First type covers range of 1027–1033 nm, has 99.9% reflectance and −4500 fs2 of group delay dispersion (GDD). When implementing these mirrors in Yb:YAG disk oscillator we observe changes on the surface of the mirrors due to thermal effects. Second type is high dispersive mirror (HDM) which provides GDD of −3000 fs2 and covers wavelength...
An all-fibre PCF-based optical parametric oscillator at 718 nm, spliced to and synchronously pumped by an all-fibre Yb-doped MOPA, reaches an average in-fibre pump-to-anti-Stokes power conversion efficiency of 10.3% at a frequency-shift of 140 THz.
The rationale and design of a a 589-nm Laser Guide Star System, based on amplification of narrow-band diode laser seeds using ESO's patented Raman Fiber approach in the near infrared and subsequent resonant frequency doubling, developed and realized by two industrial partners is presented.
We demonstrate how Brillouin scattering can be passively suppressed in meter length fiber ring cavities by carefully setting the fiber length. Experimentally we demonstrate a factor 3.4 increase in Brillouin threshold using this technique.
A 4-beam combination laser using stimulated Brillouin scattering phase conjugation mirrors is constructed. The input energy is 32.2 mJ ± 0.3 mJ, and the output energy is 169 mJ ±6 mJ. The average phase fluctuations between the sub-beams are less than λ/26.1.
Recent progress of impact ignition is reported: First, a maximum velocity ∼ 1000 km/s has been achieved under the operation of NIKE KrF laser at Naval Research Laboratory (laser wavelength = 0.25μm) in the use of a planar target made of plastic. Two-dimensional simulation have been performed for burn and ignition to show the feasibility of the impact ignition. Optimized direct illumination scheme...
A semi-analytical model is derived to evaluate the laser-induced ionization rate in dielectric materials. The method relies on a coupling between the description of the multiphoton absorption (MPA) process within the Bloch-Volkov formalism, and the material property characterization via ab-initio calculations. Preliminary results show the reliability of the model even for complex band structures.
Spectral modeling of wavelength selective switches (WSS) has previously used supergaussian functions to predict the channel bandshape. We show that an error function-based model produces a much more accurate representation of WSS channels, and allows greater utility and ease of use for modeling flexible bandwidth channel plans for next generation optical networks.
A binary grating on a Spatial Light Modulator generates twin antiphase spots with adjustable positions across the core of a multimode fibre allowing adaptive excitation of antisymmetric mode-groups for improving modal dispersion or modal multiplexing.
All-optical bit-equality checking function is demonstrated using Fabry-Perot laser diodes (FP-LDs). The proposed function is based on multi-input injection locking in FP-LDs. We measured output waveforms and eye diagram with extinction ratio of 12.33 dB.
Flat supercontinuum (SC) generation with less than 1 dB fluctuation in the telecommunication band is demonstrated using a regenerative active mode-locked fiber laser together with a dispersion-flattened highly nonlinear fiber. Such SC is highly desirable in the context of a photonic time-stretched ADC system due to its flatness, bandwidth and brightness. Experimental results presented here agree well...
We demonstrate a method of filtering broadband ASE to emulate high bit rate optically modulated signals, allowing accurately shaped artificial channels to be loaded into a channel plan for optical networks.
We present a novel optical fiber-based radio-frequency distribution system that incorporates low-cost commercially available components. It has a fractional frequency stability of 7×10−17 (averaged over 104 s) for distribution of an 80-MHz signal.
A novel all-fiber heterodyne Laser Doppler Vibrometry (LDV) for acousto-optic communication has been developed in this paper. A line width of 1 kHz single mode continuous fiber laser, two acousto-optic frequency shifters (AOFS), two balanced photodetectors and one telescope with 30 mm aperture were used in this LDV. Using the above system setup, the 6 kHz signal can be reconstructed by detecting the...
We aim at distributing the most precise frequency references provided by optical clocks, both from specialized labs to end users, and between specialized labs for comparing optical clocks. Transmitting an optical carrier over standard telecom fibre, we have transported frequency information over up to 900 km distance, with fidelity close to theoretical limits and reaching a precision of a few parts...
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