Improvement of stability and efficiency in diode-pumped passively Q-switched intracavity optical parametric oscillator with a monolithic cavity

Huang, J. Y.; Zhuang, W. Z.; Huang, Yu-Jen; Huang, Yidong; Su, Kuan-Wei; Chen, Yung-Fu

doi:10.7452/lapl.201210023

Cited by 7 publications

(4 citation statements)

References 17 publications

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“…The KTP crystal with the dimension of 3 mm Â 3 mm Â 20 mm was x -cut along ¼ 90 , ¼ 0 for the type-II non-critically phasematched OPO operation. The cavity mirrors for the OPO resonator were directly deposited on both sides of the KTP crystal to form a so-called monolithic cavity, which has proven its usefulness in improving the stability and efficiency of the eye-safe laser [23]. Referring to Fig.…”

Section: Methodsmentioning

confidence: 99%

Diode-Pumped Nd:YAP Intracavity Optical Parametric Oscillator Emitting at 1603 nm: Influence of Energy-Transfer Upconversion

et al. 2016

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A diode-end-pumped actively Q-switched Nd:YAP laser at 1080 nm is originally designed to intracavity pump a Potassium Titanyl Phosphate KTiOPO4 (KTP)-based optical parametric oscillator for obtaining the signal wavelength at 1603 nm. Under an absorbed pump power value of 11 W, the maximum average output power at the eye-safe radiation is efficiently generated to be 1.11 W at a pulse repetition rate of 10 kHz. At a pulse repetition rate of 5 kHz, the shortest pulse duration, the largest pulse energy, and the highest peak power are found to be 2.4 ns, 190 J, and 67.3 kW, respectively. In addition, the influence of energy-transfer upconversion effect on the capability of power scaling of the developed Nd:YAP fundamental laser is experimentally investigated and theoretically analyzed.

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Section: Methodsmentioning

confidence: 99%

Diode-Pumped Nd:YAP Intracavity Optical Parametric Oscillator Emitting at 1603 nm: Influence of Energy-Transfer Upconversion

et al. 2016

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“…We confirmed the threshold dependence with the theoretical model at 1064 nm and successfully generated a TEM 0,0 mode output. For the 1573-nm laser, a monolithic intracavity OPO (IOPO) cavity was used to separate the infrared and eye-safe resonators for optimization [13]. We further observed the spatial cleaning ability for the OPO resonator.…”

Section: Introductionmentioning

confidence: 97%

High-repetition-rate quasi-CW side-pumped mJ eye-safe laser with a monolithic KTP crystal for intracavity optical parametric oscillator

et al. 2014

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We demonstrate a high-repetition-rate millijoule passively Q-switched eye-safe Nd:YVO(4) laser pumped by a quasi-CW diode stack. A theoretical analysis has been explored for the design criteria of generating TEM(n,0) mode in the diode-stack directly side-pumping configuration. We successfully generate TEM(n,0) modes at 1064 nm by adjusting the gain medium with respected to the laser axis. We further observe the spatial cleaning ability for generating an nearly TEM(0,0) mode output at 1573 nm with a monolithic OPO cavity. At the repetition rate up to 200 Hz, the output pulse energy reaches 1.21 mJ with the threshold pump energy of 17.9 mJ.

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“…Despite the continuous improvement of other technologies to provide an even more performing laser emission around 1.5μm, as for instance non linear conversion crystals and systems [1], [2] or innovative fiber laser architectures [4], [4] , Erdoped phosphate glasses retain their position as a compact and low cost solution to get efficient, high power SWIR laser radiation [5] . Actually, when inserted into crystal matrices, erbium ions exhibit large nonlinear effects as up-conversion and two-photon absorption which severely limit their effectiveness as a gain media for high power lasers.…”

Section: Introductionmentioning

confidence: 98%

Operation improvement of side-pumped Er:Yb:glass lasers through optical compensation techniques

Vitiello¹,

Spinozzi²

2012

SPIE Proceedings

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In this paper we report the results of the research on a double side-pumped Er:Yb:glass slab laser. Due to the nonsymmetric power distribution inside the slab a displacement of the laser beam is observed thus leading to cavity misalignment and consequently to extraction efficiency loss. At repetition rates of about 5Hz this allows just a burst operation with an increased thermal load inside the slab. Numerical-theoretical studies about time-dependent temperature distribution in the laser material with appropriate boundary conditions concerning the considered asymmetric geometry lead to a model for mode axis thermal shift and allow to evaluate the amount of cavity misalignment in order to restore the maximal extraction efficiency. By turning or shifting the cavity mirrors is possible to improve the burst operation but the maximal overlap between the mode axis and the inverted region cannot be recovered. Then, an alternative optical configuration able to intrinsically account for the cavity misalignment has to be designed. The matrix formalism was effectively employed to calculate the specifics of one or more optical compensators to be inserted in the cavity to realign the laser resonator. Several configurations were analyzed and the beneficial effects on both thermal lensing and bending were predicted. Experimental measurements validated the model. In particular, an uninterrupted pulsed operation at the highest repetition rates was effectively recovered thus reducing the thermal load inside the laser slab and making such a laser system more effective in free-space laser applications.

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Improvement of stability and efficiency in diode-pumped passively Q-switched intracavity optical parametric oscillator with a monolithic cavity

Cited by 7 publications

References 17 publications

Diode-Pumped Nd:YAP Intracavity Optical Parametric Oscillator Emitting at 1603 nm: Influence of Energy-Transfer Upconversion

Diode-Pumped Nd:YAP Intracavity Optical Parametric Oscillator Emitting at 1603 nm: Influence of Energy-Transfer Upconversion

High-repetition-rate quasi-CW side-pumped mJ eye-safe laser with a monolithic KTP crystal for intracavity optical parametric oscillator

Operation improvement of side-pumped Er:Yb:glass lasers through optical compensation techniques

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