Femtosecond Yb:KGd(WO₄)₂laser with > 100 nJ of pulse energy

Abstract

Abstract:We report on the development of a high pulse energy femtosecond Yb:KGd(WO4)2 laser pumped by a fibercoupled diode module. Passive mode locking was initiated using a semiconductor saturable absorber mirror. The laser produced 420 fs pulses with up to 145 nJ of energy at a repetition rate of 14.5 MHz. The output spectrum was centered at 1030 nm. At the lower pulse energy of 100 nJ the laser produced 300 fs long pulses.Spectral intensity, a.u.

Organization of Astaxanthin within Oil Bodies of Haematococcus pluvialis Studied with Polarization-Dependent Harmonic Generation Microscopy

“…The laser source consisted of a femtosecond Yb:KGd(WO 4 ) 2 oscillator, which provided ∼450 fs duration pulses at a wavelength of 1028 nm with a pulse repetition rate of 14.3 MHz [36]. The laser was coupled into a home-built laser scanning microscope capable of MPF, SHG, THG detection, manipulation of the polarization of the laser light, and determination of the polarization of the emitted signals, as described in detail elsewhere [22], [31].…”

Ultrastructural features of collagen in thyroid carcinoma tissue observed by polarization second harmonic generation microscopy

“…For imaging, an in-house system consisting of a ytterbium-ion-doped potassium gadolinium tungstate (Yb:KGW) crystal-based laser oscillator operating at 1028 nm with 14.3 MHz repetition rate and ~450 fs pulse duration [10] was coupled to an in-house nonlinear optical microscope. Excitation was achieved with a 0.75 numerical aperture (NA) objective lens (Carl Zeiss, Thornwood, NY, USA), while emission occurred in the transmission geometry with a 0.85 NA objective (fabricated in-house).…”

Tunable THz frequency difference from a diode-pumped dual-wavelength Yb3+:KGd(WO4)2 laser with chirped volume Bragg gratings

“…Their broadband emission can be exploited for efficient ultra-short pulse generation [14][15][16][17]. The challenging laser emission at the 981 nm zero-line transition has been demonstrated recently [18].…”