Recent Progress on the 10PW laser Project at SIOM
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1 Recent Progress on the 10PW laser Project at SIOM Ruxin Li, Yuxin Leng, Xiaoyan Liang, and Zhizhan Xu State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences, Shanghai , China IZEST 3, LLNL, USA, July 2013
2 Outline 10 PW laser design Pulse cleaning technology 10PW amplifier design YCOB based OPCPA LBO based OPCPA Summary
3 Outline 10 PW laser design Pulse cleaning technology 10PW amplifier design YCOB based OPCPA LBO based OPCPA Summary
4 The 10PW laser project outline CPA + OPCPA hybrid system 100 TW 1 PW 10 PW Project period: Main parameters: 300J / 30fs Wavelength: 800nm Intensity: >10 23 W/cm 2 Repetition rate: single shot New pump laser system 1 PW stage 43.5m 10kJ at 1053nm, 5kJ at 532nm, 3ns pulse Potentially good for pumping 50PW beam
5 The 10 PW Laser system Main parameters: Centeral wavelength: ~800nm Energy: ~300 J Pulse duration: ~30 fs Contrast ratio: ~10 11 Focused intensity: >10 23 W/cm 2 Bandwidth Thermal effect Gain Parasitic lasing Stability Conversion efficiency CPA (Multipass) OPCPA CPA + OPCPA ~10PW laser
6 10 PW laser SIOM CPA frontend + OPCPA final amplifier PW laser 1kHz fs laser Pulse cleaner Stretcher Ti:sapphire Regen Ti:sapphire amplifier I (10Hz) Accurate synchronization 20ns Nd:glass pump laser ~400mJ/50nm ~50J/50nm Ti:sapphire amplifier II Ti:sapphire amplifier III kj level/2~3ns Nd:glass pump laser 2.5kJ@527nm OPCPA amplifier 10PW 30fs Grating pulse compressor AO ~500J/50nm
7 Current SIOM CPA 1 PW Level 10Hz Oscillator 800nm/Δλ~100nm 10nJ/9-12fs AOPDF stretcher 0.5nJ ~1.6ns Reg.Amp 800nm/4mJ Nd:YAG pump 532nm/10Hz 60mJ Nd:YAG pump Nd:glass Pump Laser 527nm ~100J/~20ns Single shot 532nm/10Hz pass Amplifier ~75J ~20J 50.8J, 1ns Final Amplifier ~3J,1ns Power Amplifier 800mJ,~1ns Compressor 800nm ~ 36.5J/~29.0fs/ ~ 1.26PW Compressor 800nm 0.4J/~23fs/ ~17TW 10Hz
8 Current SIOM CPA 1 PW Level Oscillator Compressor Stretcher 150J Nd:glass pump/single shot Target Amplifiers /10Hz Nd:YAG pump Power Amplifiers/Single shot Opt. Express 15, (2007)
9 Conversion efficiency of Ti:sapphire CPA amplifier 输出 Polynomial Fit of 输出 50 输出 泵浦 Output energy of the final amplifier as a function of the pump energy Output Beam profile The output energy of 50.8J was achieved with an 80mm Ti:sapphire, corresponding to a conversion efficiency of 46.1%. Y. Chu et al., Laser Phys. Lett (2013)
10 Outline 10 PW laser design Pulse cleaning technology 10PW amplifier design YCOB based OPCPA LBO based OPCPA Summary
11 CPA and Double CPA scheme Front end 10PW laser amplifiers First CPA Pulse Cleaner etc Stretcher Second CPA Compressor + OAP 0.1mJ, contrast ratio >10 11 High energy, contrast ratio>10 10 OPA, XPW, Saturable absorber
12 OPA + SHG as frontend with high contrast Optics Letters, 36(6): 781 (2011) (a) Idler wavelength siganal idler 0.4 total Percentium Signal wavelength Higher energy and higher contrast femtosecond pulses as the seed Contrast >10 10, dynamic range is limited by instrument. 0.5mJ/40fs and ~6% efficiency for 8.2mJ/40fs pump laser
13 OPA + SHG as frontend with high contrast Optics Letters, 36(6): 781 (2011) 800nm 1μm, stabilized CEP, high contrast
14 Contrast Enhancement for the PW laser Normalized intensity (a.u) E-3 1E-4 1E-5 1E-6 1E-7 1E-8 1E-9 1E-10 1E-11 Previous contrast ~10 8 Saturable absorber Enhanced contrast >10 11 False peaks 1E Delay (ps) 50ps ~ ps* ~ ps* ~ *dynamic range of third-order crosscorrelator (Amplitude Technologies, Sequia) Limited by the third-order cross-correlator (Amplitude Technologies, Sequia),the 10Hz repetition rate of the laser is needed. Pulse duration ~45fs,peak power 0.8PW
15 Outline 10 PW laser design Pulse cleaning technology 10PW amplifier design YCOB based OPCPA LBO based OPCPA Summary
16 Crystals for 10PW OPCPA amplifier The crystal selection for OPCPA booster amplifier is based on the properties of the crystal and the developed size. At the present, we mainly consider about LBO and YCOB (yttrium calcium oxyborate). Crystal LBO YCOB DKDP Damage threshold* (bulk damage) 8.4 GW/cm 2 Transparency range(nm) Phase matching angle θ=90 Φ=13.8 θ=26.5 φ=0 or φ= Non-collinear angle (Inner angle) d eff (pm/v) (φ=0 ) (φ=180 ) Gain bandwidth (nm) * for pulse duration of 1.3ns,1064nm
17 OPCPA booster amplifier Signal pulse (o): λs: ~770nm - 830nm Energy: 40J - 50J width(fwhm): ~1ns LBO or YCOB Pump pulse (e): λp: 527nm Energy: 2000J -2500J Width: ~2ns η=~20% Amplifier energy: 400J - 500J FWHM: 1ns -1.5ns
18 The pump laser for OPCPA New pump laser system Nd: glass 465mm 850mm 43.5m 10kJ at 1053nm, 5kJ at 532nm, 3ns pulse Potentially good for pumping 50PW beam
19 Outline 10 PW laser design Pulse cleaning technology 10PW amplifier design YCOB based OPCPA LBO based OPCPA Summary
20 YCOB OPCPA Amplifier YCOB: Phase matched angle: θ=26.5, φ=0 d eff =0.914pm/V Non collinear angle: α= 2.85 Signal pulse (o) Pump pulse (e) 527nm Intensity(a.u.) FWHM=120nm 760nm-880nm Gain bandwidth: FWHM =120 nm, 760nm 880nm λ(nm)
21 Conversion Efficiency (CE) CE CE:22% Pump fluence(gw/cm 2 ) L. Yu et al, Opt. Lett. 37(10), 1712(2012)
22 Outline 10 PW laser design Pulse cleaning technology 10PW amplifier design YCOB based OPCPA LBO based OPCPA Summary
23 Schematic of non-collinear LBO-OPCPA Pump Laser 2.85ns/527nm M1 M6 M2 OD2 M3 E1 L M4 LBO LBO OD3 M7 M8 M9 E2 M5 OD1 M1 0 S CCD 2 CCD1 LBO: 80mm 80mm 12mm Cutting angle: θ=90 o, φ=13.8 o Signal beam: 2.89J, 800nm, 1.6ns(FWHM)
24 Output Energy and Efficiency Output laser energy as a function of pump energy Amplified laser energy: E=28.68J Conversion Efficiency: η=25.38%
25 Outline 10 PW laser design Pulse cleaning technology 10PW amplifier design YCOB based OPCPA LBO based OPCPA Summary
26 CPA and OPCPA hybrid schematic system: 10PW/ ~800nm Pulse cleaner: OPA+ SHG (contrast) OPCPA Amplifier: YCOB non-collinear phase matching CE=22% LBO non-collinear phase matching CE=25% 610 TW/33.8 fs demonstrated with an 80mm LBO
27 Thank you for your attention! Better laser, better life!
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