Abstract
A time-resolved mid-infrared upconversion technique based on sum-frequency generation was applied to measure pulse propagation in λ ∼ 5.0 μm quantum cascade lasers operated in continuous wave at 30 K. The wavelength-dependent propagation delay of femtosecond mid-infrared pulses was measured to determine the total group-velocity dispersion. The material and waveguide dispersion were calculated and their contributions to the total group-velocity dispersion were found to be relatively small and constant. The small-signal gain dispersion was estimated from a measurement of the electroluminescence spectrum without a laser cavity, and was found to be the largest component of the total GVD. A negative group-velocity dispersion of β2 (=d2β/dω2) approximately - 4.6×10-6 ps2/μm was observed at the peak emission wavelength, and good agreement was found for the measured and calculated pulse-broadening.
| Original language | English |
|---|---|
| Pages (from-to) | 15898-15907 |
| Number of pages | 10 |
| Journal | Optics Express |
| Volume | 15 |
| Issue number | 24 |
| DOIs | |
| Publication status | Published - 2007 Nov 26 |
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All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
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Time-domain upconversion measurements of group-velocity dispersion in quantum cascade lasers. / Choi, Hyunyong; Diehl, Laurent; Capasso, Federico; Bour, David; Corzine, Scott; Zhu, Jintian; Höfler, Gloria; Norris, Theodore B.
In: Optics Express, Vol. 15, No. 24, 26.11.2007, p. 15898-15907.Research output: Contribution to journal › Article
TY - JOUR
T1 - Time-domain upconversion measurements of group-velocity dispersion in quantum cascade lasers
AU - Choi, Hyunyong
AU - Diehl, Laurent
AU - Capasso, Federico
AU - Bour, David
AU - Corzine, Scott
AU - Zhu, Jintian
AU - Höfler, Gloria
AU - Norris, Theodore B.
PY - 2007/11/26
Y1 - 2007/11/26
N2 - A time-resolved mid-infrared upconversion technique based on sum-frequency generation was applied to measure pulse propagation in λ ∼ 5.0 μm quantum cascade lasers operated in continuous wave at 30 K. The wavelength-dependent propagation delay of femtosecond mid-infrared pulses was measured to determine the total group-velocity dispersion. The material and waveguide dispersion were calculated and their contributions to the total group-velocity dispersion were found to be relatively small and constant. The small-signal gain dispersion was estimated from a measurement of the electroluminescence spectrum without a laser cavity, and was found to be the largest component of the total GVD. A negative group-velocity dispersion of β2 (=d2β/dω2) approximately - 4.6×10-6 ps2/μm was observed at the peak emission wavelength, and good agreement was found for the measured and calculated pulse-broadening.
AB - A time-resolved mid-infrared upconversion technique based on sum-frequency generation was applied to measure pulse propagation in λ ∼ 5.0 μm quantum cascade lasers operated in continuous wave at 30 K. The wavelength-dependent propagation delay of femtosecond mid-infrared pulses was measured to determine the total group-velocity dispersion. The material and waveguide dispersion were calculated and their contributions to the total group-velocity dispersion were found to be relatively small and constant. The small-signal gain dispersion was estimated from a measurement of the electroluminescence spectrum without a laser cavity, and was found to be the largest component of the total GVD. A negative group-velocity dispersion of β2 (=d2β/dω2) approximately - 4.6×10-6 ps2/μm was observed at the peak emission wavelength, and good agreement was found for the measured and calculated pulse-broadening.
UR - http://www.scopus.com/inward/record.url?scp=36749006618&partnerID=8YFLogxK
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U2 - 10.1364/OE.15.015898
DO - 10.1364/OE.15.015898
M3 - Article
C2 - 19550877
AN - SCOPUS:36749006618
VL - 15
SP - 15898
EP - 15907
JO - Optics Express
JF - Optics Express
SN - 1094-4087
IS - 24
ER -