High-performance uncooled 1.3-µm AlxGayIn1-x-yAs/InP strained-layer quantum-well lasers for fiber-in-the-loop applications

Among other factors, the widespread deployment of fiber-in-the-loop (FITL) is hindered by the lack of availability of low- cost laser transmitters that emit at a wavelength of 1.3 μm and operate reliably over the temperature range of −40−85°C. To date, commercial laser transmitters have relied on thermoelectric (TE) coolers to maintain the laser temperature constant against the variations in the ambient temperature because the conventional GaxIn1−xAsyP1−y/InP lasers have shown a strong temperature dependence of threshold current and external quantum efficiency.1,2