An all-acousto-optically switched picosecond Nd:YAG regenerative amplifier has been developed for operation at pulse repetition rates in the 20-100-kHz range. The amplifier produces stable 50-ps pulses at 1064 nm in a TEMOO transverse mode with pulse energies of the order of 20-100 AJ. Generation of the second harmonic at 532 nm in KTP crystal results in conversion efficiencies greater than 40%...

A simple rate equation model of a standing wave synchronously pumped dye laser yields output pulses which agree qualitatively and quantitatively with recent experimental observations. The shape, amplitude and temporal position of the simulated pulse varies dramatically, not only with cavity length detuning, but also with the gain to loss ratio. Features of pulse formation and stability are pred...

BACKGROUND Several case reports document successful treatment of sebaceous hyperplasia with the pulsed-dye laser. Moreover, noninvasive real-time confocal laser scanning microscopy elucidates the vascular nature of these lesions and their pathophysiologic response to treatment mediated by vessel coagulation. METHODS Ten patients with 29 lesions of sebaceous hyperplasia were treated with 3 sta...

PURPOSE The choroidal microvasculature and its circulation are inadequately assessed by presently available techniques. Laser-targeted delivery was applied to generate local, repetitive angiograms of the choriocapillaris in primates. METHODS Carboxyfluorescein was encapsulated in heat-sensitive liposomes and injected intravenously in monkeys. The liposome contents were then released locally i...

Progress of photodynamic therapy (PDT) in gastric cancer and the clinical outcome are described in this paper. (1) We included the whole lesion and a 5 mm margin in the field for irradiation. Marking by injection of India-ink showing the irradiation field was performed beforehand. (2) We established the standard light dose to be 90 J/cm(2) for an argon dye laser and 60 J/cm(2) for a pulse wave ...

Ultrashort pulses were produced at 248 nm by using a transverse-discharge KrF* excimer laser as a high-energy amplifier system. Input pulses for the amplifier system were obtained by upconverting the output of a modelocked visible dye laser to the ultraviolet by using nonlinear crystals. Pulses of up to 20 mJ; in energy with 10-30-psec duration were obtained at 10 pulses/sec. The output pulse w...

Using an SF6 glass plate as the intracavity Kerr medium and a double-prism pair for dispersion compensation, we developed a femtosecond transform-limited passively mode-locked dye laser. Self-starting mode locking is achieved with a dilute intracavity TCVEBI saturable-absorber jet. Within a 50% power drop the tuning range is 577-606 nm. Pulse characteristics of the laser agree with theoretical ...