The economy of Yb:lasers
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1 The economy of Yb:lasers J. Körner*, M. Wolf*, J. Hein*, S. Bock, M. Löser, M. Siebold *Institute of Optics and Quantum Electronics, Friedrich-Schiller-University, Jena (IOQ) The economy of Yb:lasers V. HEC-DPSSL Dresden
2 2nd HEC-DPSSL meeting 2005 (Jena)
3 2008: 1st diode-pumped Yb:CaF2 TW laser 200mJ, 200fs after compression 6ns (Q-switched)
4 2007: Yb:YAG ns-lasers + 300mJ, 2-6ns, 10Hz 3J, 6ns, 1Hz PFS: Petawatt Field Synthesizer
5 2006: search for new gain media Yb:CaF2) + Yb:SrF2 + Yb:CaF2 Ø ~1cm
6 Overview Projects worldwide Efficiency considerations Experiments FZD-PW laser system
7 HEC-DPSSLs worldwide
8 HEC-DPSSLs worldwide
9 HEC-DPSSLs worldwide
10 HEC-DPSSLs worldwide
11 HEC-DPSSLs worldwide
12 HEC-DPSSLs worldwide
13 HEC-DPSSLs worldwide
14 Overview Projects worldwide Efficiency considerations Experiments FZD-PW laser system
15 Efficiency considerations : Reabsorption vs. Damage Quasi-3-level 4-level
16 Efficiency considerations : Reabsorption vs. Damage Extraction limits :: - re-absorption - damage
17 Efficiency considerations : Reabsorption vs. Damage
18 Efficiency considerations : Reabsorption vs. Damage
19 Efficiency considerations : Reabsorption vs. Damage Yb:YAG
20 Efficiency considerations : Reabsorption vs. Damage Yb:CaF2
21 Efficiency considerations : Cryo cooling vs. RT Yb:YAG tpump = 800 µs FD = 10 Jcm-2
22 Efficiency considerations : Cryo cooling vs. RT Yb:CaF2 tpump = 2 ms FD = 10 Jcm-2
23 Efficiency considerations : Cryo cooling vs. RT
24 Efficiency considerations : Cryo cooling vs. RT
25 Efficiency considerations : Cryo cooling vs. RT
26 Efficiency considerations : Cryo cooling vs. RT Yb:YAG tpump = 800 µs FD = 10 Jcm-2 q = 0.3
27 Efficiency considerations : Cryo cooling vs. RT Yb:CaF2 tpump = 2 ms FD = 10 Jcm-2 q = 0.3
28 Efficiency considerations : Saturation fluence
29 Efficiency considerations : Saturation fluence
30 Efficiency considerations : Saturation fluence Laser Damage: 0 Reabsorption: Max/Min
31 Efficiency considerations : Saturation fluence?
32 Efficiency considerations : Saturation fluence n 32 N Max/Min
33 Efficiency considerations : Multipass Design n
34 Efficiency considerations : Multipass Design Yb:YAG
35 Efficiency considerations : Multipass Design Yb:CaF2
36 Efficiency considerations : Multipass Design Yb:YAG tpump = 800 µs FD = 10 Jcm-2 q = 0.3
37 Efficiency considerations : Multipass Design Yb:CaF2 tpump = 800 µs FD = 10 Jcm-2 q = 0.3
38 Experiments
39 Experiments
40 Overview Projects worldwide Efficiency considerations Experiments FZD-PW laser system
41 FZD-PW laser system : Amplifier Chain
42 FZD-PW laser system : Front end development
43 FZD-PW laser system
44 FZD-PW laser system
45 FZD-PW laser system
46 FZD-PW laser system
47 FZD-PW laser system
48 FZD-PW laser system : Amplifier Design BD ~ 1MW/cm2/sr
49 Conclusion Multipass pumping Efficiency enhancement at low fluences Homogenization (transverse + longitudinal) Requirement: Brightness of pumping diodes Optimum between Cryo-cooling + Multipass pumping
50 Thank you
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