A novel application of chirped dielectric mirrors for narrow beam focalization is proposed and demonstrated numerically and experimentally. Analogy to temporal dispersion compensation by chirped dielectric mirrors is discussed.
Holmium-doped ZBLAN fiber has proven to be an efficient high gain material in the 1.2 µm region. In this paper, single-mode fiber lasers and amplifiers at 1178 nm, 1190 nm, and 1200 nm are reported. Over 2 watts of continuous wave output power was achieved with a 10-cm long gain fiber.
This is the first time that significant Stokes output power of 0.88 W at 990 nm has been achieved using a three-level fundamental transition (quasi-cw Nd:YLF laser) with stimulated Raman scattering in a KGW crystal.
We experimentally demonstrate the RF photonics filter using optical tapped delay line based on an optical frequency comb and a PPLN waveguide as the multiplexer. RF filters with variable bandwidth, shape and center-frequency are implemented.
We demonstrate stimulated polariton emission at room temperature in a dielectric microcavity embedded with ZnO nanoparticles. The polariton lifetime is also shown to decrease drastically above the stimulated emission threshold.
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.
We present the first demonstration of nanosecond-pulsed fiber MOPA systems seeded by semiconductor laser diodes at 2 µm incorporating arbitrary pulse shaping capabilities, achieving up to 1.0 mJ (12.5 kHz, 100 ns) pulse energy.
We present simple and efficient laser schemes based on newly developed Er-doped fibers cladding pumped at 976 nm. 103 W CW-power amplifier with 37 % conversion efficiency and 1.5 mJ-pulse energy nanosecond laser were demonstrated.
We report on a narrow-linewidth master oscillator fiber amplifier system continuously tunable from 1010nm to 1086nm, delivering ns pulses with 1mJ energy over the entire band. Tunable second-harmonic generation in the visible is also presented.
A novel high pulse-energy Yb-doped all-fiber dual-cavity laser with large core-diameter fiber-based passive Q-switcher is reported. The monolithic fiber oscillator generates pulses with peak power of 3.4 kW and single pulse energy of 484 µJ.
A diode-pumped Yb:CLNGG laser is mode-locked with a single-walled carbon nanotube saturable absorber achieving pulse durations as short as 90 fs at ∼1049 nm and maximum average output power of 90 mW at 83 MHz.
An Yb:YAG SESAM-modelocked thin-disk laser delivering 1.07 ps pulses with record-high pulse energy of 80 µJ at 242 W of average power is presented. Improved SESAM designs and nonlinearity limits are explored towards multi-100 µJ modelocked oscillators.
We report efficient and robust Kerr-lens mode-locking of single-mode and tapered diode-pumped Cr:LiSAF lasers by using gain-matched output couplers. Sub-15-fs pulses were generated with peak powers above 60-kW and optical-to-optical conversion efficiencies up to 21%.
We demonstrate the first II–VI based short-wave (λ ≤ 4 µm) Quantum Cascade Detector. Peak responsivity and background limited detectivity of 0.1 mA/W and 2.5×1010 cm√Hz/W, respectively, were measured at 80 K.
We review recent results on all-optical regeneration of phase encoded signals based on phase sensitive amplification achieved by avoiding phase-to-amplitude conversion in order to facilitate the regeneration of amplitude/phase encoded (QAM) signals.
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.