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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.
We show that the non-reciprocity of traveling-wave electrodes can efficiently impress phase modulation onto the reflected upstream signals only. Monolithically integrated transceivers may thus remodulate downstream signals for upstream data transmission without needing optical circulators.
We demonstrate adjustable chirp of directly-modulated injection-locked VCSELs at 10-Gbps resulting from a novel data pattern inversion phenomenon, which leads to chromatic dispersion compensation and a 10X distance increase over standard single-mode fiber.
We demonstrate a record resonance frequency enhancement of 1.55-mum VCSELs from 10 GHz to 107 GHz under ultra-high optical injection locking. Detuning and injection-ratio dependence are characterized to show the broad applicability of the technique.
The next generation 850 nm datacom VCSEL to go into production will be the 17 G VCSEL. It is not certain that direct modulation will be suitable given the reliability, supply voltage, and temperature range required. This paper is a first look at VCSELs designed and targeted for production 17 G use. The design is discussed and LIV and small signal frequency response is presented.
GaAs nano-wire waveguides were successfully fabricated on a SiO2/Si substrate for the first time. 15 dB cross loss modulation was achieved by a few mW continuous-wave pump power within a 1.5 mm-long waveguide.
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.
A fiber-coupled difference frequency generation laser spectrometer for measuring isotopic compositions of N2O at trace concentrations is presented. Using wavelength modulation 90/00 precision at 100 ppm is achieved. The accuracy is demonstrated with enriched samples.
We demonstrate bandwidth enhancement of external- and direct-modulated lasers using a tunable optical equalizer. Modulation bandwidth of >50 GHz for LiNbO3 modulators was obtained. Also, the equalizer permits the increased-speed and chirp-reduction simultaneously for direct-modulated VCSELs.
We propose an intersubband all-optical THz switch. Adjusting the optical control switch beam even strong THz probe signals with intensities of up to 1 MW/cm2 can be modulated with extinction ratios of -80 dB/mm.
Modulation response of multi-spatial-mode semiconductor mode-locked lasers is studied by using coupled multi-mode rate equations and the analysis agrees well with previous experimental results that show the modulation response well beyond the relaxation-oscillation-resonance limit.
A technique to fill semiconductors inside a microstructured optical fiber is developed. The structural, electrical and optical properties are investigated. All-optical modulation of light and an in-fiber field effect transistor are demonstrated using this device.
A novel polarization-frequency-multiplexing scheme is implemented to suppress noise in a fiber-based Gaussian-modulated coherent-state quantum key distribution system. The achievable secrete key rate is 0.30 bit/pulse with a 5 km-fiber and 0.05 bit/pulse with a 20 km-fiber.
We observe large vibrationally-induced modulations in high order harmonic conversion in N2O4. We explain this unexpected result as due to the changing electronic structure induced by the vibration, leading to preferential emission at the outer turning point of the vibration.
We report on ultra-fast small signal sinusoidal cross-gain modulation using quantum dot semiconductor optical amplifiers exceeding a 40 GHz bandwidth in frequency and 40 nm in the wavelength domain.
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 demonstrate what we believe to be the first demonstration of stable gain-switched 845-nm pulse generation by a weak modulated 1550-nm seed laser from an Er3+-doped fluoride fiber pumped by a CW 974 nm LD.
We use the cost-effective APM technique to increase the non-linear tolerance of NRZ-OOK, and we demonstrate, in a recirculating loop experiment, the transmission over 2800 km SSMF of 16 NRZ-OOK 40 Gb/s channels with 100 GHz spacing.
We present a highly sensitive detection system for quasi-static strain, employing FM spectroscopy with a gas cell as absolute frequency reference, demonstrating a few tens of pepsiv/radicHz sensitivity between 1-6 Hz.
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