Phase locking of adjacent channel leaky waveguide CO2 lasers

Abstract

Phase locking has been achieved between two adjacent waveguide CO2 lasers separated by a thin plate of ZnSe. Radiation leakage from one waveguide to the other through the ZnSe causes the phase locking, and stationary interference fringes demonstrate the relative phase stability. Both waveguide lasers are excited by dc discharges and operate on one of several P or R transitions in the 10.4-μm band. Phase locking occurs whenever both waveguides are on the same transition. An n by m array of such phase-locked lasers has the potential of nearly an (n×m)2 increase in the peak of the lasers’ far-field irradiance distribution.

Transverse mode control and switching in gas laser arrays

“…There have been reports of several designs of phase coupled waveguide CO 2 laser arrays [3], [8], [9]. The structure in [8] was chosen for experimental investigation because our previous experience with it.…”

The research of phase-locking of more discharge tubes for two-dimensional axisymmetric-fold combination resonator CO2 laser

“…In recent years, array lasers and r-f excitation technique become popular [1,2], which are used in hollow bore ridge staggered CO 2 laser array, leaky-mode-coupled laser array, limit parameter wave-guide CO 2 laser array, groove-coupled strip waveguide CO 2 laser array [3][4][5][6]. These lasers can obtain phase-locking coherence output but the further improvement of output power is restricted by the small width of single lasing unit Then the concept of area-scaling is introduced into array lasers which obtain successful results [7][8][9].…”

Model of Nonlinear Operation of a Waveguide Laser with Gaussian Output Mirror

“…In general, the transverse distribution of the laser mode inside the waveguide is determined by the geometry of the waveguide and is described by waveguide modes [5,12,381 In our model, because of the presence of the Gaussian mirror, we assume that laser action inside the waveguide develops on the fundamental waveguide mode EH11 given by Eq. (2.9) with n = m = 1.…”

“…ERI9ńm (x, y, z) and E^ 9ń;^(x, y, z) describe appropriate transverse field distribution in the free-space (the Hermite-Gauss or the Laguerre-Gauss modes [27] [5,12] EN, nmb (x ) y, z) = EW qnm(x) y, z) = Egnm(x ) y, z). Subscript q denotes longitudinal mode number.…”

“…They have been intensively studied theoretically [5][6][7][8][9][10][11] as well as experimentally [12][13][14][15][16][17][18][19]. The efforts to demonstrate and characterise different devices with different gases (especially with CO2) as an active medium, and experiments with different resonators and waveguide types have been reviewed in several very good papers [20][21][22].…”