Fig. 3
From: Tapered Quantum Cascade Laser Arrays Integrated with Talbot Cavities
a Calculated near-field patterns of the N = 1, 3, 5 order supermodes in a five-element diffraction-coupled array. The fundamental supermode (N = 1) is calculated based on the straight-end connected to the Talbot cavity, and the high-order supermodes (N = 3, 5) are based on taper connected to the Talbot cavity. b The simulated far-field patterns according to a. c The measured far-field distribution of QCL array with straight-end connected to a Talbot cavity. d The measured far-field distribution of QCL array with taper-end connected to a Talbot cavity