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We achieve pulse compression down to 24 fs with 1.1 mJ energy and full carrier-envelope phase (CEP) stabilisation at 1 kHz using a compressor combining prisms and chirped mirrors. We demonstrate that this hybrid compression scheme can be scaled in order to produce CEP-stabilized sub-30 fs pulses at the multi-mJ level.
We demonstrate an interferometric configuration comprising a saturable Bragg reflector for phase-to-amplitude response conversion. Its static nonlinear phase response is determined and used to obtain tunable nonlinear amplitude depth modulation.
Tuned by a variable reflective mirror, we achieve 71.2-W free-running and 30-W maximum average power in range of 1866-2107 nm in Tm-doped fiber lasers. Watt-level powers are generated from single crystal and ceramic Cr2+:ZnSe disk lasers.
CW operation is achieved in novel semiconductor ring lasers based on retro-reflector cavities with parabolic mirrors downsized to equivalent ring radius of 16mum at room temperature. L-I curves and optical spectra are observed.
We report an advance in the power scaling of fluoride fiber lasers using FBGs. Watt-level output power at 1480 nm is demonstrated, which is four-fold greater than the best result obtained with external bulk mirrors.
We present the first systematic study of recombination dynamics in InAs QD-SESAMs. Decreasing growth temperature and increasing indium coverage reduces the recovery time from 1500 to 24 ps, leading to shorter pulses in modelocked VECSELs.
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.
We describe a diode-pumped Cr3+:LiCAF laser which produces 590 mW of continuous-wave output power using two pump diodes. Passive mode locking with a semiconductor saturable absorber mirror produces 97-fs, 2.8-nJ pulses near 800 nm wavelength.
A spectrometer resolution limited 300 pm linewidth is achieved in a volume Bragg grating stabilized Thulium fiber laser. Slope efficiency and output power are comparable to a similar resonator formed by a broadband high reflectivity mirror.
Novel architecture of deformable mirror is presented. The monomorph mirror presents the advantage of avoiding high-spatial frequency on the residual wavefront enabling propagation without energy modulation. The residual wavefront at rest is 3.4 nm rms.
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.
Fabry-Perot cavity filtering of broadband optical frequency combs is studied experimentally and theoretically. Effects of dispersion, mirror coatings, and carrier envelope offset frequency are analyzed while highlighting applications to waveform generation and spectroscopic references.
We demonstrate the use of a new wavefront analyser called MIROMA in a laser chain to measure the residual spatial modulations of the beam induced by footprints of a deformable mirror and prevent optical damages.
We report experimental results on a laser based on a Nd:YCOB crystal cut as a sphere inserted between two plane mirrors. It is being used as a unique tool for the direct characterization of self-doubling.
The single-photon exchange between a satellite and an Earth-based station has been investigated using satellite-laser-ranging retroreflectors in orbit. A return rate of 5 photons-per-second was measured from satellite Ajisai at 1650 km from the observer.
We experimentally realized a diffractive unstable laser resonator with a Gaussian shaped outcoupled beam. The structured mirror is assembled with a VECSEL which produces a high beam quality even for the highest amplifier gain.
An effective method to control the temporal structure of femtosecond pulses by microoptical retroreflector arrays is presented. Multipulses of variable delay or variable pulse duration were generated and detected by second order autocorrelation.
We report on a passively mode-locked erbium fiber laser operating in a highly-positive dispersion regime. Highly-chirped pulses with 5.4 ps duration and 8 nm spectral bandwidth are generated. They are compressed down to 757 fs.
Precise semiconductor saturable absorber mirrors (SESAM) design has enabled modelocked lasers with >100 GHz pulse repetition rate or >10 muJ pulse energy. We discuss a new method for wide dynamic range nonlinear reflection measurements of SESAMs with <0.05% accuracy.
The vertical and horizontal polarization modes of a cavity QED system become correlated through a single atom. Their auto-correlation and cross-correlations show an avenue for the study of the steady state entanglement in this system.
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