Scalable antiguided ribbon laser

A new scalable fiber laser approach to phase locking of multiple gain cores in an antiguided structure is described and modeled. In essence, the waveguide comprises a periodic sequence of gain-loaded and no-gain segments that has a uniform refractive index (referred to as the ribbon) encapsulated within a reduced-index cladding region. Our calculations reveal that the constant-index profile within the ribbon structure provides optimal mode discrimination; the refractive index must be constant within ±0.001 to ensure single-mode operation for a five-core design. One-dimensional and two-dimensional calculations are pursued to support the design criteria. Slight periodic variation in the refractive index of the ribbon laser leads to the emergence of a photonic bandgap, in analogy to so-called holey fibers. Our constant-index design, together with the periodic gain profile, may be described as a photonic metal.

[1]  Experimental and numerical determination of coupling constant in a multicore fiber , 2000 .

[2]  William J. Wadsworth,et al.  Yb3+-doped photonic crystal fibre laser , 2000 .

[3]  David J. Richardson,et al.  Holey optical fibers: an efficient modal model , 1999 .

[4]  A. Liu,et al.  A high-brightness laser beam from a phase-locked multicore Yb-doped fiber laser array , 2001, IEEE Photonics Technology Letters.

[5]  M. Feit,et al.  Spectral approach to optical resonator theory. , 1981, Applied optics.

[6]  D. V. Vysotsky,et al.  Phase locking in a multicore fiber laser by means of a Talbot resonator. , 2000, Optics letters.

[7]  Michael D. Feit,et al.  Analysis of rib waveguides and couplers by the propagating beam method , 1990 .

[8]  A. Tünnermann,et al.  High-power cw neodymium-doped fiber laser operating at 9.2 W with high beam quality. , 1995, Optics letters.

[9]  David G. Mehuys,et al.  Supermode control in diffraction‐coupled semiconductor laser arrays , 1988 .

[10]  M. D. Feit,et al.  Computation of mode eigenfunctions in graded-index optical fibers by the propagating beam method. , 1980, Applied optics.

[11]  Dan Botez,et al.  Phase-locked arrays of antiguides: analytical theory II , 1994 .

[12]  E. Yablonovitch,et al.  Inhibited spontaneous emission in solid-state physics and electronics. , 1987, Physical review letters.

[13]  Erik Zucker,et al.  110 W fibre laser , 1999 .

[14]  Thomas Søndergaard,et al.  Waveguidance by the photonic bandgap effect in optical fibres , 1999 .

[15]  D F Welch,et al.  Modal analysis of linear Talbot-cavity semiconductor lasers. , 1991, Optics letters.

[16]  M. Feit,et al.  Mode properties of optical fibers with lossy components by the propagating beam method. , 1981, Applied optics.

[17]  Anatoly P. Napartovich,et al.  Analytical theory of phase-locked arrays of antiguided diode lasers , 1997, Photonics West.