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Femtosecond optical frequency combs (FOFCs) with output wavelengths covering visible light have potential applications in absolute frequency measureflent of iodine-stabilized lasers and optical clock lasers. Based on optical amplification, frequency doubling and spectrum broadening, a home-made Er-fiber femtosecond optical frequency comb (Er-FOFC) with output wavelengths covering visible light is demonstrated. One path with an average power of 8 mW from Er-FOFC is used as the seed pulse for spectrum broadening to cover the visible light. This path is first amplified to 532 mW by injecting into an Er-doped femtosecond fiber amplifier with combined forward and backward pumping and then frequency doubled with a MgO: PPLN crystal with an output power of 85 mW, frequency-doubling efficiency of 32% and pulse duration of 85fs. The output power of this path can be first amplified to 532 mW through an Er-doped femtosecond fiber amplifier when the forward pumping and backward pumping both turn on. Then the frequency-doubling laser can be generated in a MgO: PPLN crystal. The frequency-doubling efficiency is 32% and the pulse duration is 85 fs; the frequency-doubling light is spectrally broadened from 500 to 1000 nm in a photonic crystal fiber (PCF), with an output power of 85 mW and coupling efficiency of 50%. To verify the performance of the broadened spectrum, the light from the Er-FOFC and a compact iodine-stabilized frequency-doubled Nd: YAG laser at 532 nm is beaten. A beat signal with a signal-to-noise ratio of 30 dB at 100 kHz RBW is obtained, which provides a useful tool for absolute frequency measureflent of visible lasers.
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Keywords:
- Er-doped fiber laser /
- fiber optical frequency comb /
- spectrum broadening /
- optical frequency metrology
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[4] Chou C W, Hume D B, Koelemeij J C J, Wineland D J, and Rosenband T 2010 Phys. Rev. Lett. 104 070802
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[12] Peng J L, Ahn H, Shu R H, Chui H C, Nicholson J W 2007 Appl. Phys. B 86 49
[13] Kieu K, Jones R J, Peyghambarian N 2010 Opt. Express 18 21350
[14] Cao S Y, Cai Y, Wang G Z, Meng F, Zhang Z G, Fang Z J, Li T C 2011 Acta Phys. Sin. 60 094208 (in Chinese) [曹士英, 蔡岳, 王贵重, 孟飞, 张志刚, 方占军, 李天初 2011 60 094208]
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[16] Eickhoff M L, Hall J L 1995 IEE E T rans. Inst rum. Meas. 44 155
[17] Diddams S A, Jones D J, Ye J, Cundiff S T, Hall J L, Ranka J K, Windeler R S, Holzwarth R, Udem T, Hänsch T W 2000 Phys. Rev. Lett. 84 5102
[18] Fujieda M, Kumagai M, Nagano S, Yamaguchi A, Hachisu H, Ido T 2011 Opt. Express 19 16498
[19] Ludlow A D, Zelevinsky T, Campbell G K, Blatt S, Boyd M M, de Miranda M H G, Martin M J, Thomsen J W, Foreman S M, Ye J, Fortier T M, Stalnaker J E, Diddams S A, Le Coq Y, Barber Z W, Poli N, Lemke N D, Beck K M, Oates C W 2008 Science 319 1805
[20] Cao S Y, Meng F, Lin B K, Fang Z J, Li T C 2012 Acta Phys. Sin. 61 134205 (in Chinese) [曹士英, 孟飞, 林百科, 方占军, 李天初 2012 61 134205]
[21] Lin B K, Cao S Y, Zhao Y, Li Y, Wang Q, Lin Y G, Cao J P, Zang E J, Fang Z J, Li T C 2014 Chinese J. Lasers 41 0902002 (in Chinese) [林百科, 曹士英, 赵阳, 李烨, 王强, 林弋戈, 曹建平, 臧二军, 方占军, 李天初 2014 中国激光 41 0902002]
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[1] Udem Th, Reichert J, Holzwarth R, Hänsch T W 1999 Phys. Rev. Lett. 82 3568
[2] Stone J A, Egan P 2010 J. Res. Natl. Inst. Stand. Technol. 115 413
[3] Kohno T, Yasuda M, Hosaka K, Inaba H, Nakajima Y, Hong F L 2009 Appl. Phys. Express 2 072501
[4] Chou C W, Hume D B, Koelemeij J C J, Wineland D J, and Rosenband T 2010 Phys. Rev. Lett. 104 070802
[5] Campbell G K, Ludlow A D, Blatt S, Thomsen J W, Martin M J, de Miranda M H G, Zelevinsky T, Boyd M M, Ye J, Diddams S A, Heavner Th P, Parker Th E, Jefferts S R 2008 Metrologia. 45 539
[6] Huang Y, Cao J, Liu P, Liang K, Ou B, Guan H, Huang X, Li T, Gao K 2012 Phys. Rev. A 85 030503
[7] Thorpe M J, Balslev-Clausen D, Kirchner M S, Ye J 2008 Opt. Express 16 2387
[8] Coddington I, Swann W C, Nenadovic L, Newbury N R 2009 Nat. Photonics 3 351
[9] Keilmann F, Gohle C, Holzwarth R 2004 Opt. Lett. 29 1542
[10] Washburn B R, Diddams S A, Newbury N R, Nicholson J W, Yan M F, Jorgensen C G 2004 Opt. Lett. 29 250
[11] Ruehl A, Marcinkevicius A, Fermann M E, Hartl I 2010 Opt. Lett. 35 3015
[12] Peng J L, Ahn H, Shu R H, Chui H C, Nicholson J W 2007 Appl. Phys. B 86 49
[13] Kieu K, Jones R J, Peyghambarian N 2010 Opt. Express 18 21350
[14] Cao S Y, Cai Y, Wang G Z, Meng F, Zhang Z G, Fang Z J, Li T C 2011 Acta Phys. Sin. 60 094208 (in Chinese) [曹士英, 蔡岳, 王贵重, 孟飞, 张志刚, 方占军, 李天初 2011 60 094208]
[15] Lea S N, Rowley W R C, Margolis H S, Barwood G P, Huang G, Gill P 1, Chartier J M, Windeler R S 2003 Metrologia 40 844
[16] Eickhoff M L, Hall J L 1995 IEE E T rans. Inst rum. Meas. 44 155
[17] Diddams S A, Jones D J, Ye J, Cundiff S T, Hall J L, Ranka J K, Windeler R S, Holzwarth R, Udem T, Hänsch T W 2000 Phys. Rev. Lett. 84 5102
[18] Fujieda M, Kumagai M, Nagano S, Yamaguchi A, Hachisu H, Ido T 2011 Opt. Express 19 16498
[19] Ludlow A D, Zelevinsky T, Campbell G K, Blatt S, Boyd M M, de Miranda M H G, Martin M J, Thomsen J W, Foreman S M, Ye J, Fortier T M, Stalnaker J E, Diddams S A, Le Coq Y, Barber Z W, Poli N, Lemke N D, Beck K M, Oates C W 2008 Science 319 1805
[20] Cao S Y, Meng F, Lin B K, Fang Z J, Li T C 2012 Acta Phys. Sin. 61 134205 (in Chinese) [曹士英, 孟飞, 林百科, 方占军, 李天初 2012 61 134205]
[21] Lin B K, Cao S Y, Zhao Y, Li Y, Wang Q, Lin Y G, Cao J P, Zang E J, Fang Z J, Li T C 2014 Chinese J. Lasers 41 0902002 (in Chinese) [林百科, 曹士英, 赵阳, 李烨, 王强, 林弋戈, 曹建平, 臧二军, 方占军, 李天初 2014 中国激光 41 0902002]
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