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We present a gain-switched-diode-seeded 1034.5-nm master oscillator power amplifier, employing direct amplification through standard commercial Yb3+-doped fibres to generate 15.6µJ-pulse-energy, 126kW-peak-power, picosecond pulses with 3dB spectral bandwidth of 0.87nm.
Suppression of detrimental modal interference effects within a cladding-pumped multimode thulium fiber amplifier is achieved using variable bandwidth seed source. The amplifier produced pulse energies of 1.1mJ and peak powers over 20kW at 1956nm.
Repeatability of resonance detection for on-chip microring resonators is systematically studied. An efficient interferometric method is presented to improve the accuracy by more than one order of magnitude in an 8 nm bandwidth, without any temperature control.
A novel ultra-broad bandwidth ultrasound detector is demonstrated using imprinted polymer microring, with flat frequency response up to ∼350 MHz at −3dB. A record high sub-3µm axial resolution in ultrasound/photoacoustic imaging applications is demonstrated.
We experimentally demonstrate that a minute continuous-wave becalms Raman soliton and thus actively suppresses supercontinuum. The effects are characterized in detail by real-time spectrally-resolved statistical analysis enabled by optical time-stretch.
We present a proof-of-principle of broadband, non-collinear quasi-phase-matching in a hybrid OPCPA system. It employs a combination of quasi-phase-matching and group-velocity-matching in a MgO:PPLN delivering 3.4-µm, 17.2-µJ, 43.1-fs pulses at 50 kHz repetition-rate.
We have obtained record gain of 60 dB with a continuous-wave two-pump fiber optical parametric amplifier, over a 5.5-nm bandwidth. We used a 500-m long fiber, and 1.5 W of pump power.
We present an ultra-broadband OPCPA system operating at 3.4 µm delivering 41.6-fs pulses. The average output power is currently 600 mW, corresponding to 12 µJ of pulse energy at a repetition rate of 50 kHz.
Difference-frequency generation between signal and idler of Yb-fiber laser synchronously-pumped femtosecond / picosecond OPOs at 53/80 MHz provides maximum single pulse energies exceeding 1 nJ and continuous tuning from 5 µm to 12 µm.
Glass-clad Cr4+:YSO crystal fibers were grown using the laser-heated pedestal growth method. Quasi-3-level behavior of the Cr4+:YSO was observed, and the emission was red shifted to 1302 nm with a 3-dB bandwidth of 230 nm.
We demonstrate two 1Tbit/s superchannel architectures using a compact, FSR-tunable gain-switched comb source. SSMF transmission of 18GBaud Nyquist-WDM shaped PDM-QPSK and PDM-16QAM modulation is reported, with a capacity up to 1.296Tbit/s and SE of 7.2bit/s/Hz.
Wide bandwidth, ultra-low voltage modulators based on substrate removal technology and loaded line traveling wave electrodes are presented. Drive voltage product is 0.06 V-cm and 2 mm long devices have electrical-to-electrical bandwidths exceeding 80 GHz.
We report a broadband mid-IR femtosecond OPO tunable across 2179–3732 nm, pumped by 20-fs pulses at 790 nm, generating idler pulses of 4.3 optical cycles (33 fs) at 2282 nm, with high stability and beam-quality.
We compare dynamical properties of ground and excited state emission from 1.31 µm quantum-dot lasers. Dichroic facet mirrors ensure oscillations at either ground or excited state. Maximum bandwidths observed are 10.51 and 16.25 GHz, respectively.
We report carrier-envelope offset beat detection (52-dB signal-to-noise ratio at 100-kHz resolution bandwidth) with a common-path 2f-to-3f self-referencing interferometer with a dual-pitch periodically poled lithium niobate ridge waveguide.
Excited-state lasing in quantum dot lasers is theoretically demonstrated to exhibit a broader modulation response, lower chirp-to-power ratio, and smaller linewidth enhancement factor in comparison with the conventional lasing in the ground state.
Using a metamaterial composite, we demonstrate a bandpass filter that has only a single transmission mode from 0 to >25 THz. This usable bandwidth matches, or exceeds, that of currently used THz sources.
We present the first dual-gain SESAM-modelocked thin-disk laser. Using Yb-doped sesquioxide crystals with 8-nm shifted emission peaks, we achieve large overall bandwidth from crystals with excellent thermo-mechanical properties and generate 138-fs pulses in proof-of-principle experiments.
An optical parametric amplifier signal and its unconverted pump are studied as a method of waveform synthesis. Generating broad spectra with self phase modulation to create coherent multi-octave CEP stabilized pulses is discussed.
We report a broad frequency comb centered at 2.09 µm produced by a degenerate OPO. We achieve 0.6W of 94-fs transform limited pulses at 250MHz and a conversion efficiency of 64%.
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