Mutual injection coupling and phase locking of two multiwavelength fiber lasers

Abstract. Passive phase locking of two multiwavelength fiber lasers has been demonstrated by mutual injection coupling and spatial filtering. Since the fiber loop mirrors are employed as two component lasers’ rear reflectors, multiple wavelengths operate simultaneously owing to their broadband reflection and the compound cavity’s mode selection effect. A single-mode filtering fiber is utilized to collect the expected spatial mode’s energy and feed them back into the coupled laser cavity, and stable and high visibility interference fringes have been obtained by the self-phasing process. A contrastive experiment has been made to investigate its coherent output properties when the rear mirrors are replaced by fiber Bragg gratings. Compared with the ordinary coherent combining of fiber lasers lasing at a single-wavelength, higher output power and efficiency have been obtained, and the cost is that the output beams’ coherence and stability decrease slightly.

[1]  Ken-ichi Ueda,et al.  Fiber Laser Coherent Array for Power Scaling, Bandwidth Narrowing, and Coherent Beam Direction Control , 2005, 2005 Pacific Rim Conference on Lasers & Electro-Optics.

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

[3]  Alain Barthélémy,et al.  Coherence properties of two fiber lasers coupled by mutual injection. , 2009, Optics express.

[4]  Pengfei Ma,et al.  Analysis of multi-wavelength active coherent polarization beam combining system. , 2014, Optics express.

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

[6]  Nir Davidson,et al.  Phase locking of two fiber lasers with time-delayed coupling. , 2009, Optics letters.

[7]  Amiel A Ishaaya,et al.  Imposing narrow spectral bandwidth in a system of passively combined fiber lasers. , 2013, Optics letters.

[8]  Philippe Roy,et al.  Coherent combining of fibre lasers , 2006 .

[9]  Pu Zhou,et al.  Phase locking of a 275 W high power all-fiber amplifier seeded by two categories of multi-tone lasers. , 2011, Optics express.

[10]  Pu Zhou,et al.  Coherent beam combination of three two-tone fiber amplifiers using stochastic parallel gradient descent algorithm. , 2009, Optics letters.

[11]  Craig Robin,et al.  Two-dimensional diffractive coherent combining of 15 fiber amplifiers into a 600 W beam. , 2012, Optics letters.

[12]  Liu Zejin,et al.  Analysis of multiwavelength coherent beam combining effect. , 2012, Applied optics.

[13]  Pu Zhou,et al.  Coherent beam combining of high power fiber lasers: Progress and prospect , 2013, Science China Technological Sciences.

[14]  Vincent Kermène,et al.  Experimental demonstration of passive coherent combining of fiber lasers by phase contrast filtering. , 2012, Optics express.

[15]  Nir Davidson,et al.  Recent developments in passive phase locking and coherent combining of lasers , 2012, Other Conferences.

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

[17]  R. Beach,et al.  Analysis of the scalability of diffraction-limited fiber lasers and amplifiers to high average power. , 2008, Optics express.

[18]  Pu Zhou,et al.  Mutual Injection-Locking and Coherent Combining of Two Individual Fiber Lasers , 2008 .

[19]  D. B. Mortimore,et al.  Fiber loop reflectors , 1988 .

[20]  Asher A. Friesem,et al.  Passive phase locking of 25 fiber lasers. , 2010, Optics letters.

[21]  Bing Lei,et al.  Phase locking of an array of three fiber lasers by an all-fiber coupling loop. , 2007, Optics express.

[22]  C C Davis,et al.  Atmospheric propagation and combining of high-power lasers. , 2016, Applied optics.

[23]  Baishi Wang,et al.  All-fiber passive coherent combining of high power lasers , 2011 .

[24]  Bing He,et al.  Experimental demonstration of phase locking of a two-dimensional fiber laser array using a self-imaging resonator , 2008 .

[25]  Tso Yee Fan,et al.  Beam combining of ytterbium fiber amplifiers (Invited) , 2007 .

[26]  Johan Nilsson,et al.  Direct observation of Kramers-Kronig self-phasing in coherently combined fiber lasers. , 2013, Optics letters.

[27]  A. Gavrielides,et al.  Coherent combining of spectrally broadened fiber lasers. , 2007, Optics express.

[28]  A. B. Ruffin,et al.  502 Watt, single transverse mode, narrow linewidth, bidirectionally pumped Yb-doped fiber amplifier. , 2007, Optics express.