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A long-term stable sub-8 fs Ti:sapphire oscillator based on domestic chirped mirrors is reported. It outputs 300 mW mode-locked pulses at 86 MHz under 4 W pump power. The second order and third order of dispersion introduced by the components of the oscillator are analyzed. Two pairs of domestically designed and fabricated chirped mirrors are utilized to compensate the dispersion introduced by the crystal and the air in cavity. By precisely controlling the dispersion of chirp mirrors, the output pulses have an ultra-broad bandwidth exceeding 150 nm (FWHM) without the insertion of wedges. With the assistance of extra-cavity dispersion compensation, a pulse duration of 7.9 fs is achieved. This is the shortest pulse duration ever reported by using domestic chirped mirrors, and the shortest pulse duration achieved without intra-cavity wedges, to the best of our knowledge. Structure design and electronic feed-back loops are employed to improve the stability of the oscillator passively and actively, respectively. With the assistance of piezoelectric ceramic, the power stability within 24 h is measured to be 0.6%, which is significantly better than that without them.
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Keywords:
- chirped mirrors /
- Ti:sapphire /
- long-term stable /
- sub-8 fs
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[2] Gilbertson S, Chini M, Feng X, Khan S, Wu Y, Chang Z 2010 Phys. Rev. Lett. 105 263003
[3] Zhao K, Zhang Q, Chini M, Wu Y, Wang X, Chang Z 2012 Opt. Lett. 37 3891
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[9] Zhang L, Han H N, Zhang Q, Wei Z Y 2012 Chin. Phys. Lett. 29 114208
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[12] Wang Y Z, Shao J D, Yi K, Qi H J, Wang D, Leng Y X 2013 Acta Phys. Sin. 62 204207 (in Chinese) [王胭脂, 邵建达, 易葵, 齐红基, 王玎, 冷雨欣 2013 62 204207]
[13] Liao R, Wen J H, Liu Z G, Deng L, Zhang H C, Lai T S, Lin W Z 2002 Chin. Sci. Bull. 47 345 (in Chinese) [廖睿, 文锦辉, 刘智刚, 邓莉, 张海潮, 赖天树, 林位株 2002 科学通报 47 345]
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[1] Spence D E, Kean P N, Sibbett W 1991 Opt. Lett. 16 42
[2] Gilbertson S, Chini M, Feng X, Khan S, Wu Y, Chang Z 2010 Phys. Rev. Lett. 105 263003
[3] Zhao K, Zhang Q, Chini M, Wu Y, Wang X, Chang Z 2012 Opt. Lett. 37 3891
[4] Udem T, Holzwarth R, Hansch T W 2002 Nature 416 233
[5] Crespo H M, Birge J R, Falcao-Filho E L, Sander M Y, Benedick A, Kartner F X 2008 Opt. Lett. 33 833
[6] Zhao Y Y, Wang P, Zhang W, Tian J R, Wei Z Y 2007 Sci. China: Phys. Mech. Astron. 37 123 (in Chinese) [赵研英, 王鹏, 张炜, 田金荣, 魏志义 2007 中国科学G 37 123]
[7] Song Y J, Hu M L, Wang Y Z, Shao J D, Jin Y X, Chai L, Fan X Z, Wang Q Y 2010 Acta Opt. Sin. 30 3215 (in Chinese) [宋有建, 胡明列, 王胭脂, 邵建达, 晋云霞, 柴路, 范修正, 王清月 2010 光学学报 30 3215]
[8] Zhang Q, Zhao Y Y, Wei Z Y 2009 Chin. Phys. Lett. 26 044208
[9] Zhang L, Han H N, Zhang Q, Wei Z Y 2012 Chin. Phys. Lett. 29 114208
[10] Jung I D, Kartner F X, Matuschek N, Sutter D H, Morier-Genoud F, Zhang G, Keller U 1997 Opt. Lett. 22 1009
[11] Morgner U, Kartner F X, Cho S H, Chen Y, Haus H A, Fujimoto J G, Ippen E P 1999 Opt. Lett. 24 411
[12] Wang Y Z, Shao J D, Yi K, Qi H J, Wang D, Leng Y X 2013 Acta Phys. Sin. 62 204207 (in Chinese) [王胭脂, 邵建达, 易葵, 齐红基, 王玎, 冷雨欣 2013 62 204207]
[13] Liao R, Wen J H, Liu Z G, Deng L, Zhang H C, Lai T S, Lin W Z 2002 Chin. Sci. Bull. 47 345 (in Chinese) [廖睿, 文锦辉, 刘智刚, 邓莉, 张海潮, 赖天树, 林位株 2002 科学通报 47 345]
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