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In this paper, we will present our results on different high-power GaSb-based optically pumped semiconductor disk lasers (OPSDLs) emitting in the 1.9-2.8 mum wavelength range, with the emphasis on the power scaling capability of these long-wavelength laser by using the following different concepts: increasing the pumped area, using multiple gain chips and using in-well pumped structures.
Intracavity Raman lasers are a simple means to shift the frequency of solid-state lasers. The authors report on the use of new low birefringence diamond to address this issue in conventional lasers and its subsequent use in a CW Raman laser.
In this work we investigate the performance of a novel ultrashort laser cavity design that incorporates an intracavity deformable mirror as a versatile phase-control element. With this cavity it is possible to induce user- defined phase changes into the pulse directly from the laser oscillator, as depicted in Fig. 1 thereby eliminating the need for an additional external pulse shaper.
The optically-pumped semiconductor disk laser (SDL) is now well established as a high-brightness, watt- class laser source. As well as raw power scaling this laser format also offers flexibility and functionality due to the engineerable semiconductor structure and external optical cavity. Wavelength coverage of 0.4 to 2.35mum has been realised. The demonstration of tunable, tailored and optimized...
This paper will give further results obtained from introducing electrothermal and electrostatic MEMS within laser cavities with particular attention given to the thermal effects of the micromirror, and new modulation/control prospects. The exploitation of the MEMS devices in solid-state lasers operating at 1.5mum will also be described.
We describe a continuous-wave optical parametric oscillator operated within a semiconductor disk laser, free of relaxation oscillations associated with neodymium-based systems. Parametric threshold occurred at 1.4 W primary (diode) pump power and 8.5 W yielded 205 mW idler.
A large-stroke bimorph was used to reduce the time-to-full brightness of a Nd:YLF laser by a factor of 3. The 31-element mirror has the potential to combine this transient control with steady state brightness optimisation.
Power scaling by increasing the pump spot area is shown to be intrinsically limited in semiconductor disk lasers with diamond heatspreaders. An output power of 9W is reported for a 1060 nm device.
In this paper, we present our work in the implementation and performance optimization of the recall operation of the brain-state-in-a-box (BSB) model on the cell broadband engine processor. We have applied optimization techniques on different parts of the algorithm to improve the overall computing and communication performance of the BSB recall algorithm. Runtime measurements show that, we have been...
Cogent confabulation is a computation model that mimics the Hebbian learning, information storage, inter-relation of symbolic concepts, and the recall operations of the brain. The model has been applied to cognitive processing of language, audio and visual signals. In this project, we focus on how to accelerate the computation which underlie confabulation based sentence completion through software...
We report multi-watt, TEM00 emission from a 2μm Sb-based optically-pumped semiconductor disk laser utilising an intra-cavity diamond heatspreader for thermal management. An output power of 5W and a wide tunability of over 160nm are achieved.
The slope efficiency of semiconductor disk lasers is seen to be reduced at high output coupling. Careful adjustment of the cavity and pump mode sizes is also necessary for high efficiency and good beam quality.
A large-stroke bimorph was used to reduce the time-to-full brightness of a Nd:YLF laser by a factor of 3. The 31-element mirror has the potential to combine this transient control with steady state brightness optimisation.
The optically-pumped semiconductor disk laser is shown to be a practical low-noise pump source for Cr2+:chalcogenide lasers. Results on cw-pumping of a Cr2+:ZnSe and quasi-cw-pumping of a Cr2+:CdZnTe laser are presented.
We describe the operation of a femtosecond Cr4+:YAG laser that has been mode locked using a novel GaInNAsSb SESAM. 230fs pulses were generated at an average output power of 280mW.
Power scaling by increasing the pump spot area is shown to be intrinsically limited in semiconductor disk lasers with diamond heatspreaders. An output power of 9W is reported for a 1060 nm device.
Power scaling by increasing the pump spot area is shown to be intrinsically limited in semiconductor disk lasers with diamond heatspreaders. An output power of 9 W is reported for a 1060 nm device.
We describe the operation of a femtosecond Cr4+:YAG laser that has been mode locked using a novel GaInNAsSb SESAM. 230 fs pulses were generated at an average output power of 280 mW.
A large-stroke bimorph was used to reduce the time-to-full brightness of a Nd:YLF laser by a factor of 3. The 31-element mirror has the potential to combine this transient control with steady state brightness optimisation.
We report multi-watt, TEM00 emission from a 2 mum Sb-based optically-pumped semiconductor disk laser utilising an intra-cavity diamond heat spreader for thermal management. An output power of 5 W and a wide tunability of over 160 nm are achieved.
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