Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Thomas Earles"'
Autor:
Ayushi Rajeev, Weixin Chen, Jeremy D. Kirch, Susan E. Babcock, Thomas F. Kuech, Thomas Earles, Luke J. Mawst
Publikováno v:
Crystals, Vol 8, Iss 11, p 437 (2018)
Quantum wells and barriers with precise thicknesses and abrupt composition changes at their interfaces are critical for obtaining the desired emission wavelength from quantum cascade laser devices. High-resolution X-ray diffraction and transmission e
Externí odkaz:
https://doaj.org/article/ac725b07ba4c4dd7ad185b3fc921bd90
Publikováno v:
IEEE Photonics Technology Letters. 33:820-823
Grating-coupled, surface-emitting (GCSE) quantum-cascade lasers (QCLs) of linear geometry generally operate in an antisymmetric mode, which is undesirable due to its double-lobed far-field beam pattern. The antisymmetric mode can be suppressed by des
Autor:
Jae Ha Ryu, Robert Bedford, Ricky Gibson, Dan Botez, Luke J. Mawst, C. Boyle, C. Sigler, D. Lindberg, Jeremy Kirch, Thomas Earles
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 25:1-9
A three-element phase-locked array of ∼5.3 μm-emitting quantum cascade lasers fabricated by a two-step MOCVD process is demonstrated which operates in a diffraction-limited beam to 5.3 W peak pulsed power. To compensate for overetching at the arra
Autor:
Dmitry V. Vysotsky, Alexey Belyanin, N. N. Elkin, Thomas Earles, C. Sigler, Dan Botez, Luke J. Mawst, Anatoly P. Napartovich, C. Boyle, Jeremy Kirch
Publikováno v:
IEEE Journal of Quantum Electronics. 55:1-10
A numerical model is developed for a phase-locked array of quantum cascade lasers. The population density is derived from rate equations. The temperature distribution for stationary generation is produced by ohmic heating. It is shown that the result
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 23:1-6
Five-element phase-locked arrays of 4.7 μ m-emitting quantum cascade lasers are demonstrated which operate either in a near-diffraction-limited (D.L.) beam to 3.6 W peak pulsed power or in a narrow beam (< 3.5 × D.L.) up to 6.1 W peak pulsed power.
Above-Threshold Modeling of Resonant Leaky-Wave Coupled Phase-Locked Array of Quantum Cascade Lasers
Autor:
C. Sigler, N. N. Elkin, Jeremy Kirch, C. Boyle, Alexey Belyanin, Anatoly P. Napartovich, Thomas Earles, Dmitry V. Vysotsky, Dan Botez, Luke J. Mawst
Publikováno v:
2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
Phase-locked array of diode lasers is an attractive way to achieve multi-Watt power single-mode operation. Theoretical analysis of the optical modes of planarized phase-locked quantum cascade laser arrays (QCLA) emitting at 4.8 pm was performed in [1
Autor:
Luke J. Mawst, K. Oresick, Yuri V. Flores, D. Lindberg, Thomas Earles, C. Boyle, Jeremy Kirch, Dan Botez
Publikováno v:
Novel In-Plane Semiconductor Lasers XVIII.
Step-taper active-region (STA) quantum cascade lasers (QCLs) allow for both carrier-leakage suppression and ultrafast, miniband-like carrier extraction. In turn, that has led to very high internal-efficiency ni values: ~ 77 % and 80-86 % from ~ 5.0
Autor:
Weixin Chen, Ayushi Rajeev, Jeremy Kirch, Luke J. Mawst, Susan E. Babcock, Thomas F. Kuech, Thomas Earles
Publikováno v:
Crystals, Vol 8, Iss 11, p 437 (2018)
Crystals
Volume 8
Issue 11
Crystals
Volume 8
Issue 11
Quantum wells and barriers with precise thicknesses and abrupt composition changes at their interfaces are critical for obtaining the desired emission wavelength from quantum cascade laser devices. High-resolution X-ray diffraction and transmission e
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 21:97-106
A theoretical analysis of the optical and thermal characteristics of planarized phase-locked quantum cascade laser (QCL) arrays emitting at 4.8 μm was performed. Large aperture seven-element designs are established with a reasonably large process wi
Autor:
Jae Cheol Shin, Luke J. Mawst, Dan Botez, Thomas Earles, Jeremy Kirch, Gun-Kim Doo, D. Lindberg, K. Oresick, C. Boyle, Chun Chieh Chang, Minhyeok Jo, Honghyuk Kim, C. Sigler
Publikováno v:
SPIE Proceedings.
Implementation of the step-taper active-region (STA) design to 8-9 μm-emitting quantum cascade lasers (QCLs) has resulted in both high T0 and T1 values: 220 K and 665 K, and short lower-level lifetimes: 0.12 ps. In turn, the internal differential ef