Your Search Results

Use this resource - and many more! - in your textbook!

AcademicPub holds over eight million pieces of educational content for you to mix-and-match your way.

Experience the freedom of customizing your course pack with AcademicPub!
Not an educator but still interested in using this content? No problem! Visit our provider's page to contact the publisher and get permission directly.

Optically- and electrically-pumped type-II "W" quantum well lasers for the mid IR

By: Sugg, A.R.; Olsen, G.H.; Connolly, J.C.; Garbuzov, D.Z.; Martinelli, R.U.; Menna, R.J.; Lee, H.; Yang, M.J.; Stokes, D.W.; Olafsen, L.J.; Felix, C.L.; Vurgaftman, I.; Bewley, W.W.; Meyer, J.R.; Maiorov, M.;

2000 / IEEE / 1-55752-634-6


This item was taken from the IEEE Conference ' Optically- and electrically-pumped type-II "W" quantum well lasers for the mid IR ' Optically pumped mid-IR lasers with type-II "W" active regions (InAs-GaInSb-InAs-AlAsSb) recently lased cw at temperatures up to 290 K at /spl lambda/=3.0 /spl mu/m and to 135 K at 7.1 /spl mu/m. The cw output power exceeded 0.5 W at 78 K and /spl lambda/=3.2 /spl mu/m. However, conversion efficiencies must be improved if the ultimate goal of high cw power at thermoelectric-cooler temperatures is to be achieved. Here we report encouraging progress toward that objective using the optical-pumping injection cavity (OPIC) approach, in which the active region is enclosed in an etalon cavity whose resonance is tuned to the pump wavelength, /spl lambda//sub pump/. Experiments on MBE-grown structures containing semiconductor Bragg mirrors above and below the active quantum wells (QWs) confirm that the multiple passes of the pump result in (1) enhanced pump-beam absorptance, (2) reduced threshold, and (3) reduced internal loss.