Low noise, continuous-wave single-frequency 1.5-μm laser generated by a singly resonant optical parametric oscillator

We report on an idler-resonant femtosecond optical parametrical oscillator (OPO) based on BiB3O6 (BiBO) crystal, synchronously pumped by a frequency-doubled, mode-locked Yb:KGW laser at 515 nm. The idler wavelengths of OPO can be tuned from 1100 nm to 1540 nm. At a repetition rate of 75.5 MHz, the OPO generates as much as 400 mW of idler power with 3.1 W of pump power, the corresponding pulse duration is 80 fs, which is 1.04 times of Fourier transform-limited (FTL) pulse duration at 1305 nm. In addition, the OPO exhibits excellent beam quality with M 2 < 1.8 at 1150 nm. To the best of our knowledge, this is the first idler-resonant femtosecond OPO pumped by 515 nm.

Section: Introductionmentioning

confidence: 99%

A 515-nm laser-pumped idler-resonant femtosecond BiB₃O₆ optical parametric oscillator

Yang¹,

Wang²,

Jia³

et al. 2022

“…The coherent electromagnetic wave in near to midinfrared (IR) spectrum has wide applications in industry, environmental monitoring, spectroscopy, telecommunication, [1][2][3] and so on. The intracavity optical parametric oscillators provide a practical devise to obtain the coherent electromagnetic wave in this spectrum.…”

Section: Introductionmentioning

confidence: 99%

The influence of stimulated temperature-dependent emission cross section on intracavity optical parametric oscillator

Samimi¹,

Keshavarz²

2017

In this paper, the influence of temperature on the intracavity optical parametric oscillator (IOPO) is investigated by using the stimulated temperature-dependent emission cross section of laser crystal. The rate equations under plane wave approximation have been used for simulation of signal output pulse. Results show that the signal output pulse width is decreased by increasing the laser crystal temperature. Also, the signal output energy is increased by the increasing of the laser crystal temperature. The simulation results for IOPO based on Nd:YAG and Nd:YVO 4 , show that the signal pulse energies are increased by 3.2 and 5.6 times respectively when the laser crystal temperature increased from 15 • C to 300 • C. The presented model indicates that the temperature sensitivity of Nd:YVO 4 -based IOPOs is more than that of Nd:YAG-based IOPOs which is expected from a physical point of view.

“…The development of all-solid-state high-power singlefrequency laser sources is necessary for many applications, such as laser telemetry, laser spectroscopy, optical holography, nonlinear optics, [1,2] and quantum information. Neodymiumdoped yttrium vanadate (Nd:YVO 4 ) is a suitable laser crystal for a diode pumped laser owing to its high emission and high absorption cross section.…”

Section: Introductionmentioning

confidence: 99%

Suppressing the preferential σ-polarization oscillation in a high power Nd:YVO₄laser with wedge laser crystal

Zheng¹,

Zhou²,

Wang³

et al. 2013

We observe the phenomenon of priority oscillation of the unexpected σ-polarization in high-power Nd:YVO 4 ring laser. The severe thermal lens of the σ-polarized lasing, compared with the π-polarized lasing, is the only reason for the phenomenon. By designing a wedge Nd:YVO 4 crystal as the gain medium, the unexpected σ-polarization is completely suppressed in the entire range of pump powers, and the polarization stability of the expected π-polarized output is enhanced. With the output power increasing from threshold to the maximum power, no σ-polarization lasing is observed. As a result, 25.3 W of stable single-frequency laser output at 532 nm is experimentally demonstrated.