Active polarisation control of a quantum cascade laser using tuneable birefringence in waveguides
MetadataShow full item record
We discuss the design, modelling, fabrication and characterisation of an integrated tuneable birefringent waveguide for quantum cascade lasers. We have fabricated quantum cascade lasers operating at wavelengths around 4450 nm that include polarisation mode converters and a differential phase shift section. We employed below laser threshold electroluminescence to investigate the single pass operation of the integrated device. We use a theory based on the electro-optic properties of birefringence in quantum cascade laser waveguides combined with a Jones matrix based description to gain an understanding of the electroluminescence results. With the quantum cascade lasers operating above threshold we demonstrated polarisation control of the output. © 2013 Optical Society of America.
Showing items related by title, author, creator and subject.
Dhirhe, D.; Slight, T.; Holmes, B.; Hutchings, D.; Ironside, Charlie (2012)We discuss the design, fabrication and characterization of waveguide polarization mode converters for quantum cascade lasers operating at 4.6 µm. We have fabricated a quantum cascade laser with integrated polarization ...
Nshii, C.; Ironside, Charlie; Sorel, M.; Slight, T.; Zhang, S.; Revin, D.; Cockburn, J. (2011)Quantum cascade lasers (QCLs) are semiconductor lasers based on intersubband transitions in quantum wells. Semiconductor lasers in ring format do not need cleaved facets or gratings to achieve optical feedback required ...
Room-temperature operation of discrete-mode InGaAs-AlAsSb quantum-cascade laser with emission at ?=3.3 µmPhelan, R.; Slight, T.; Kelly, B.; O'Carroll, J.; McKee, A.; Revin, D.; Zhang, S.; Krysa, A.; Kennedy, K.; Cockburn, J.; Ironside, Charlie; Meredith, W.; O'Gorman, J. (2010)Discrete-mode quantum-cascade lasers have been developed in the InGaAsAlAsSbInP materials system. For an uncoated 10-µm-wide ridge waveguide and 3000-µm-long cavity, the laser had a threshold current density J th of 4.2 ...