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Coherent synthesis of laser pulses is a major trend in the generation of ultrafast pulse field. There is no good way to compensate for the whole spectrum when the spectrum of ultrashort pulses is wide enough to reach an octave, so it is difficult to realize a sub-cycle pulse in a single-path laser system even if the spectrum range is wide enough. In this paper, 0.8 mJ, 30 fs laser pulses at 1 kHz repetition rate with 790 nm center wavelength from a Ti:sapphire chirped pulse amplifier (CPA) system are focused into hollow fiber with an inner diameter of 250 μm and a length of 1 m to produce an octave-spanning white-light supercontinuum (450-950 nm). Using this supercontinuum, we conduct two sets of comparative experiments. 1) We split the supercontinuum into two pulses with different spectrum ranges (450-750 nm and 650-1000 nm) by a dichroic mirror (HR, 500-700 nm; HT, 700-1000 nm), and we compress the two pulses by the double-chirped mirrors and wedge pairs to generate two few-cycle pulses:the long and short wavelength yielding pulses are 7.9 fs and 6.1 fs, respectively. Then we coherently synthesize two pulses by using another dichroic mirror, and controlling the relative time delay between the two pulses, and thus we synthesize a pulse of 4.1 fs. 2) We directly compress the supercontinuum by the double-chirped mirrors and wedge pairs, and obtain an optimization result of 5.3 fs, of which the pulse duration is wider than that in experiment 1. In these comparative experiments, the advantage of coherent synthesis for shorter pulse duration is preliminarily verified. Besides, the balanced optical cross-correlator technique is used to lock the relative time delay between two pulses. The root-mean-square value of relative time delay drift is less than 80 as in the case with feedback control loop, which ensures the stability of coherent synthesis system. This scheme can be adopted to accurately compensate for the dispersion and obtain the sub-cycle synthesized pulse, which is useful for generating the high harmonic and atto-second pulse.
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Keywords:
- coherent synthesis /
- balanced optical cross-correlator /
- relative time delay control /
- dispersion compensation
[1] Brocklesby W S, Nilsson J, Schreiber T, Limpert J, Brignon A, Bourderionnet J, Lombard L, Michau V, Hanna M, Zaouter Y, Tajima T, Mourou G 2014 Eur. Phys. J. Special Topics 223 1189
[2] Danson C, Hillier D, Hopps N, Neely D 2015 High Power Laser Sci. Eng. 3 3
[3] Kozlov V A, Hernandez-Cordero J, Morse T F 1999 Opt. Lett. 24 1814
[4] Manzoni C, Mucke O D, Cirmi G, Fang S, Moses J, Huang S W, Hong K H, Cerullo G, Kartner F X 2015 Laser Photon Rev. 9 129
[5] Sokolov A V, Walker D R, Yavuz D D, Yin G Y, Harris S E 2000 Phys. Rev. Lett. 85 562
[6] Shverdin M Y, Walker D R, Yavuz D D, Yin G Y, Harris S E 2005 Phys. Rev. Lett. 94 033904
[7] Chan H S, Hsieh Z M, Liang W H, Kung A H, Lee C K, Lai C J, Pan R P, Peng L H 2011 Science 331 1165
[8] Hsieh Z M, Lai C J, Chan H S, Wu S Y, Lee C K, Chen W J, Pan C L, Yee F G, Kung A H 2009 Phys. Rev. Lett. 102 213902
[9] Hassan M T, Wirth A, Moulet A, Luu T T, Gagnon J, Pervak V, Goulielmakis E 2012 Rev. Sci. Instrum. 83 111301
[10] Hassan M T, Luu T T, Moulet A, Raskazovskaya O, Zhokhov P, Garg M, Karpowicz N, Zheltikov A M, Pervak V, Krausz F, Goulielmakis E 2016 Nature 530 66
[11] Huang S W, Cirmi G, Moses J, Hong K H, Bhardwaj S, Birge J R, Chen L J, Li E, Eggleton B J, Cerullo G, Kartner F X 2011 Nat. Photon. 5 475
[12] Manzoni C, Huang S W, Cirmi G, Farinello P, Moses J, Kartner F X, Cerullo G 2012 Opt. Lett. 37 1880
[13] Mucke O D, Fang S, Cirmi G, Giulio, Rossi M, Chia S H, Ye H, Yang Y D, Mainz R, Manzoni C, Farinello P, Cerullo G, Kartner F X 2015 IEEE J. Sel. Top. Quantum Electron 21 8700712
[14] Xin M, Safak K, Peng M Y, Kalaydzhyan A, Wang W T, Mucke O D, Kartner F X 2017 Light Sci. Appl. 6 16187
[15] Diels J C, Rudolph W 2006 Ultrashort Laser Pulse Phenomena (Vol. 1) (Burlington: Elsevier) pp2-10
[16] Sweetser J N, Fittinghoff D N, Trebino R 1997 Opt. Lett. 22 519
[17] Chipperfield L E, Robinson J S, Tisch J W G, Marangos J P 2009 Phys. Rev. Lett. 102 063003
[18] Paul P M, Toma E S, Breger P, Mullot G, Auge F, Balcou P, Muller H G, Agostini P 2001 Science 292 1689
[19] Henischel M, Kienberger R, Spielmann C, Reider G A, Milosevic N, Brabec T, Corkum P, Heinzmann U, Drescher M, Krausz F 2001 Nature 414 509
[20] Gaumnitz T, Jain A, Pertot Y, Huppert M, Jordan I, Ardana-Lamas F, Worner H J 2017 Opt. Express 25 27506
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[1] Brocklesby W S, Nilsson J, Schreiber T, Limpert J, Brignon A, Bourderionnet J, Lombard L, Michau V, Hanna M, Zaouter Y, Tajima T, Mourou G 2014 Eur. Phys. J. Special Topics 223 1189
[2] Danson C, Hillier D, Hopps N, Neely D 2015 High Power Laser Sci. Eng. 3 3
[3] Kozlov V A, Hernandez-Cordero J, Morse T F 1999 Opt. Lett. 24 1814
[4] Manzoni C, Mucke O D, Cirmi G, Fang S, Moses J, Huang S W, Hong K H, Cerullo G, Kartner F X 2015 Laser Photon Rev. 9 129
[5] Sokolov A V, Walker D R, Yavuz D D, Yin G Y, Harris S E 2000 Phys. Rev. Lett. 85 562
[6] Shverdin M Y, Walker D R, Yavuz D D, Yin G Y, Harris S E 2005 Phys. Rev. Lett. 94 033904
[7] Chan H S, Hsieh Z M, Liang W H, Kung A H, Lee C K, Lai C J, Pan R P, Peng L H 2011 Science 331 1165
[8] Hsieh Z M, Lai C J, Chan H S, Wu S Y, Lee C K, Chen W J, Pan C L, Yee F G, Kung A H 2009 Phys. Rev. Lett. 102 213902
[9] Hassan M T, Wirth A, Moulet A, Luu T T, Gagnon J, Pervak V, Goulielmakis E 2012 Rev. Sci. Instrum. 83 111301
[10] Hassan M T, Luu T T, Moulet A, Raskazovskaya O, Zhokhov P, Garg M, Karpowicz N, Zheltikov A M, Pervak V, Krausz F, Goulielmakis E 2016 Nature 530 66
[11] Huang S W, Cirmi G, Moses J, Hong K H, Bhardwaj S, Birge J R, Chen L J, Li E, Eggleton B J, Cerullo G, Kartner F X 2011 Nat. Photon. 5 475
[12] Manzoni C, Huang S W, Cirmi G, Farinello P, Moses J, Kartner F X, Cerullo G 2012 Opt. Lett. 37 1880
[13] Mucke O D, Fang S, Cirmi G, Giulio, Rossi M, Chia S H, Ye H, Yang Y D, Mainz R, Manzoni C, Farinello P, Cerullo G, Kartner F X 2015 IEEE J. Sel. Top. Quantum Electron 21 8700712
[14] Xin M, Safak K, Peng M Y, Kalaydzhyan A, Wang W T, Mucke O D, Kartner F X 2017 Light Sci. Appl. 6 16187
[15] Diels J C, Rudolph W 2006 Ultrashort Laser Pulse Phenomena (Vol. 1) (Burlington: Elsevier) pp2-10
[16] Sweetser J N, Fittinghoff D N, Trebino R 1997 Opt. Lett. 22 519
[17] Chipperfield L E, Robinson J S, Tisch J W G, Marangos J P 2009 Phys. Rev. Lett. 102 063003
[18] Paul P M, Toma E S, Breger P, Mullot G, Auge F, Balcou P, Muller H G, Agostini P 2001 Science 292 1689
[19] Henischel M, Kienberger R, Spielmann C, Reider G A, Milosevic N, Brabec T, Corkum P, Heinzmann U, Drescher M, Krausz F 2001 Nature 414 509
[20] Gaumnitz T, Jain A, Pertot Y, Huppert M, Jordan I, Ardana-Lamas F, Worner H J 2017 Opt. Express 25 27506
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