Multiple phonon resonance quantum cascade lasers

Details Multiple phonon resonance quantum cascade lasers Multiple phonon resonance quantum cascade lasers

2007-10-30

2009-10-27

Nguyen, Dung T (Department: 2828)

Coherent light generators

Particular active media

Semiconductor

C372S044010, C372S045010

Reexamination Certificate

active

07609738

ABSTRACT:
Quantum-cascade lasers are provided with an active section in which relaxation of carriers from a lower laser level is provided by three or more phonon-assisted transitions to levels within the active section whose energies are below the energy of the lower laser level. The gain region of the laser consists of alternating active and injector sections, with an injection barrier inserted between each injector section and the adjacent active section, and an exit barrier inserted between each active section and the adjacent injector section. The active section comprises a sufficient number of quantum wells separated by quantum barriers to produce the desired energy-level structure consisting of an upper laser level, a lower laser level, and at least three levels that have lower energies than the lower laser level, with the separation of adjacent energy levels below and including the lower laser level that are at least equal to the energy of the quantum well material's longitudinal optical phonon.

REFERENCES:
patent: 4622671 (1986-11-01), Tsang
patent: 5333141 (1994-07-01), Wolf et al.
patent: 5457709 (1995-10-01), Capasso et al.
patent: 5588015 (1996-12-01), Yang
patent: 5594750 (1997-01-01), Zhang et al.
patent: 5793787 (1998-08-01), Meyer et al.
patent: 5799026 (1998-08-01), Meyer et al.
patent: 6324199 (2001-11-01), Capasso et al.
patent: 6404791 (2002-06-01), Yang
patent: 6500688 (2002-12-01), Bruno et al.
patent: 6553045 (2003-04-01), Kaspi
patent: 6625195 (2003-09-01), Henrichs
patent: 6751244 (2004-06-01), Faist et al.
patent: 7408966 (2008-08-01), Botez
patent: 2004/0223528 (2004-11-01), Wortman et al.
patent: 2004/0223529 (2004-11-01), Bruno et al.
patent: 2006/0056466 (2006-03-01), Belenky et al.
patent: 2007/0008999 (2007-01-01), Breznay et al.
patent: 2007/0248131 (2007-10-01), Botez et al.
patent: WO 01/26192 (2001-04-01), None
patent: WO 03/023912 (2003-03-01), None
Bose et al., “Electron velocity in indium phosphide single-heterojunction quantum wells”, Semicond. Sci. Technol., 1991, pp. 1135-1140, vol. 6.
Knodl et al., “CW Room Temperature Operation of a Diode Cascade VCSEL”, Annual Report 1999, Dept. of Optoelectronics, University of Ulm, pp. 90-93.
Knodl et al, “Bipolar Cascade VCSEL with 130% Differential Quantum Efficiency”, Annual Report 2000, University of Ulm, pp. 11-14.
Felix et al., “Mid-infrared W quantum-well lasers for noncryogenic continuous-wave operation”, Applied Optics, Feb. 20, 2001, pp. 806-811, vol. 40, No. 6.

Affiliated with

Also associated with

Rating

Multiple phonon resonance quantum cascade lasers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multiple phonon resonance quantum cascade lasers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple phonon resonance quantum cascade lasers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4141286