Author : Rowel Canaon Go
Publisher :
ISBN 13 :
Total Pages : 35 pages
Book Rating : 4.:/5 (11 download)
Book Synopsis Room Temperature Operation of Quantum Cascade Lasers Monolithically Integrated Onto a Lattice-mismatched Substrate by : Rowel Canaon Go
Download or read book Room Temperature Operation of Quantum Cascade Lasers Monolithically Integrated Onto a Lattice-mismatched Substrate written by Rowel Canaon Go and published by . This book was released on 2018 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: A small sample of 2 cm2 size was taken from a 6-inch wafer and processed into ridge-waveguide chips 3 mm x 30 [micrometer] in size. Lateral current injection scheme was utilized due to an insulating M-buffer layer. Preliminary reliability testing up to 200 minutes of runtime showed no sign of power degradation. Laser chips with high reflection (HR) coating showed optical power over 200 mW of total peak power at cryogenic temperature (78 K), with lasing seen up to 230 K. In this temperature range, the measured characteristic temperatures of T0 ≈ 460 K and T1 ≈ 210 K describes the temperature dependence for threshold current and slope efficiency. Adding a partial HR coating (56%) on the front facet extended the lasing range above room temperature (303 K). This thesis will also discuss the preliminary cryogenic temperature result of the first InP-based QCL grown on latticemismatched silicon (Si) substrate.