Diode-pumped Yb:CaF multipass amplifier producing 50 mJ with dynamic analysis for high repetition rate operation

被引：0

作者：

Friebel, Florence ^{[1
]}

Pellegrina, Alain ^{[2
]}

Papadopoulos, Dimitris N. ^{[2
]}

Camy, Patrice ^{[3
]}

Doualan, Jean-Louis ^{[3
]}

Moncorge, Richard ^{[3
]}

Georges, Patrick ^{[1
]}

Druon, Frederic ^{[1
]}

机构：

[1] Univ Paris 11, CNRS, Inst Opt, Lab Charles Fabry, F-91127 Palaiseau, France

[2] Univ P & M Curie, CEA, CNRS, Lab Utilisat Lasers Intenses,Ecole Polytech, Palaiseau, France

[3] Univ Caen, CEA CNRS ENSI Caen, Ctr Rech Ions Mat & Photon CIMAP, UMR 6252, F-14050 Caen, France

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2014年 / 117卷 / 02期

关键词：

THERMOOPTICAL COEFFICIENTS; YTTERBIUM LASERS; HIGH-INTENSITY; SHORT-PULSE; YB; OSCILLATOR; CRYSTALS; FEMTOSECOND; FLUORIDE; CAF2;

D O I：

10.1007/s00340-014-5872-4

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The dynamic thermal issues of the Yb:CaF crystals within a multi-tens-mJ-energy multipass amplifier operating in the 20-100 Hz repetition rate range and pumped in quasi-cw regime have been studied at different timescales. Thermal response times of the system have been precisely investigated and analyzed, for the first time to our best knowledge in such amplifiers. This study includes a dual timescale analysis: in the long-time-scale (second) with direct thermography mapping and in the millisecond range with thermal lensing in a pump-probe configuration. Very atypical positive lens behavior with fluorites will also be presented and discussed. This complete analysis is used to demonstrate the capability of multipass amplifier systems for operating the amplifier at 20 Hz with 57 mJ and 100 Hz with 32-mJ stable regime. Indeed, high repetition rate multipass amplifier has been realized for the first time with and for this energy. The results have been analyzed precisely to take into account the thermal issues and excellent beam quality, with a of 1.1. The pointing stability of 20 mu rad has been measured documenting the reliability of the high repetition rate mJ amplifier.

引用

页码：597 / 603

页数：7

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