Intracavity Spontaneous Parametric Down-Conversion in Bragg Reflection Waveguide Edge Emitting Diode

Abstract

A four-wavelength Bragg reflection waveguide edge emitting diode based on intracavity spontaneous parametric down-conversion and four-wave mixing (FWM) processes is made. The structure and its tuning characteristic are designed by the aid of FDTD mode solution. The laser structure is grown by molecular beam epitaxy and processed to laser diode through the semiconductor manufacturing technology. Fourier transform infrared spectroscopy is applied to record wavelength information. Pump around 1.071 μm, signal around 1.77 μm, idler around 2.71 μm and FWM signal around 1.35 μm are observed at an injection current of 560 mA. The influences of temperature, carrier density and pump wavelength on tuning characteristic are shown numerically and experimentally.

Semi-automatic engineering and tailoring of high-efficiency Bragg-reflection waveguide samples for quantum photonic applications

“…This converges with a straightforward fixed-point iteration, but we have to recalculate the set of eigenmodes multiple times. According to our experience, this is unnecessary, since the optimization works well if we simply set n eff to 3.15 in equation (21) to avoid the costly iterations. Because of the BRW geometry and the requirement of reasonable aluminum concentrations, the effective mode index is mostly limited to values between = n 3.13 eff and 3.18.…”

“…Nevertheless, one can still try to derive useful samples from the dataset. While the wrong phasematching wavelength is non-trivial to correct, we can use equation (21) to find the proper layer thicknesses of the mirror pairs. It turns out that almost all samples will either shift the phasematching wavelength to an undesired value or the total nonlinearity is reduced to numbers similar to tables 1 or 2.…”

“…Combined with the established semiconductor process, this makes them a prime choice for the integration of optoelectronic circuits. Several important milestones, such as threewave mixing [2][3][4][5][6], correlated and entangled photon-pair production [7][8][9][10][11][12][13][14][15][16][17][18] or electrically injected lasers [10,15,[19][20][21] have been demonstrated in this system. Recently, engineering of the generated photon-pair state has come into focus [12,13,16,18].…”