Passive coherent combination of all-fiber multichannel pulsed laser based on optical feed-back ring cavity

Self-organized passive coherent beam combination of multichannel pulsed laser with all-fiber configuration is reported. The phase of multichannel Yb-doped pulsed fiber amplifiers is locked by optical feed-back ring cavity. The traditional disadvantage of energy dissipation to side lode for lower aperture filling is solved via all-fiber laser array with single-aperture configuration. Coherent beam combination of four pulsed fiber amplifiers is experimentally demonstrated. Variable pulsed laser can be obtained by adjusting a AOM,stable combination pulsed fiber laser with excellent temporal and spatial characteristic is achieved. The efficiency of coherent combination is up to 85.0%. This approach presented here provides a feasible technique for power scaling of high-power pulsed fiber laser and maintaining beam quality simultaneously.

[1]  Jérôme Lhermite,et al.  Passive phase locking of an array of four fiber amplifiers by an all-optical feedback loop. , 2007, Optics letters.

[2]  Erik J. Bochove,et al.  Spatial filtering of large mode area fibre lasers using a self-Fourier cavity for high power applications , 2007 .

[3]  许晓军 Xu Xiaojun,et al.  Aperture Filling——an Important Technique in Coherent Beam Combining of Fiber Laser Array , 2010 .

[4]  J. Oudar,et al.  Tunable high-repetition-rate fiber laser for the generation of pulse trains and packets. , 2007, Optics letters.

[5]  Eric Cheung,et al.  Coherently coupled high power fiber arrays , 2004, 2006 Digest of the LEOS Summer Topical Meetings.

[6]  Bing He,et al.  Passive coherent beam combination of two nanosecond fiber amplifiers by using an all-optical feedback loop , 2013, Photonics West - Lasers and Applications in Science and Engineering.

[7]  T. Fan.  Laser beam combining for high-power, high-radiance sources , 2005, IEEE Journal of Selected Topics in Quantum Electronics.

[8]  Bing He,et al.  Polarization self-selection in a coherent beam combination system with an all-optical feedback loop. , 2012, Applied optics.

[9]  Bing He,et al.  Coherent beam combination of seven high power fiber amplifers with an all-optical feedback loop , 2012, Photonics Asia.

[10]  Jianqiu Cao,et al.  Effect of mutual-injection ways on phase locking of arrays of two mutually injected fiber lasers: theoretical investigation , 2010 .

[11]  V. Kermene,et al.  Experimental study of cophasing dynamics in passive coherent combining of fiber lasers. , 2011, Optics letters.

[12]  D.C. Jones,et al.  200 W self-organized coherent fiber arrays , 2005, (CLEO). Conference on Lasers and Electro-Optics, 2005..

[14]  Bing He,et al.  High Power Passive Phase Locking of Four Yb-Doped Fiber Amplifiers by an All-Optical Feedback Loop , 2011 .

[15]  Bing He,et al.  Coherent beam combination of two nanosecond fiber amplifiers by an all-optical feedback loop. , 2012, Optics letters.

[16]  M. Wright,et al.  Yb-doped fiber amplifier for deep-space optical communications , 2005, Journal of Lightwave Technology.

[17]  David Sabourdy,et al.  Coherent combining of Q-switched fibre lasers , 2004 .

[18]  Liu Zejin,et al.  Theoretic analysis on self-organized coherence of fiber laser array , 2007 .

[19]  Pu Zhou,et al.  Coherent beam combination of two-dimensional high power fiber amplifier array using stochastic parallel gradient descent algorithm , 2009 .

[20]  C. Corcoran,et al.  Passive Phasing in a Coherent Laser Array , 2009, IEEE Journal of Selected Topics in Quantum Electronics.