Abstract
Second-harmonic generation (SHG) is reported in quantum cascade (QC) lasers with active regions that also support nonlinear cascades with large second order nonlinear susceptibility. SHG has been measured from 10 up to 250 K heat sink temperature, with about 1 μW of nonlinear power at 10 K and about 50 nW at 250 K. Single-mode and tunable SHG at 3.5 μm wavelength has been measured from single-mode QC distributed feedback lasers operating at the fundamental pump wavelength of 7.0 μm. Thermal tuning results in a tuning rate for the SHG emission of ∼0.2 nm/K for temperatures above ∼100 K.
Highlights
This article was downloaded from Harvard University's DASH repository
latter are also based on intersubband transitions in semiconductor QWs
for many different configurations.[3]. In a companion paper we report on the optimization of SHG
Summary
Temperature dependence and single-mode tuning behavior of second-harmonic generation in quantum cascade lasers
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
