Abstract
We report a new experimental approach to study the temporal gain dynamics of an actively mode-locked external-cavity laser diode. The experiment can be viewed as an electrical pump-optical probe technique. Picosecond time resolution is achieved by synchronizing the actively mode-locked semiconductor laser to a mode-locked Ti:sapphire laser. The transmission of the Ti:sapphire pulses through the active region of the laser diode is then measured as a function of photon energy and delay time. Our experiment allows to investigate the dynamics of the entire gain spectrum with picosecond time resolution since the Ti:sapphire laser is wavelength tunable. On the basis of these data we are able to determine directly the wavelength dependence of the differential gain. The results compare well with microscopic calculations. The implication for the mode-locking behavior of the diode laser is discussed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1756-1762 |
| Number of pages | 7 |
| Journal | IEEE Journal of Quantum Electronics |
| Volume | 30 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 1994 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Physics and Astronomy (miscellaneous)
Cite this
Picosecond gain dynamics of an actively mode-locked external-cavity laser diode. / Hofmann, M.; Koch, M.; Feldmann, J.; Elsasser, W.; Gobel, E. O.; Koch, Stephan W; Koch, S. W.
In: IEEE Journal of Quantum Electronics, Vol. 30, No. 8, 08.1994, p. 1756-1762.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Picosecond gain dynamics of an actively mode-locked external-cavity laser diode
AU - Hofmann, M.
AU - Koch, M.
AU - Feldmann, J.
AU - Elsasser, W.
AU - Gobel, E. O.
AU - Koch, Stephan W
AU - Koch, S. W.
PY - 1994/8
Y1 - 1994/8
N2 - We report a new experimental approach to study the temporal gain dynamics of an actively mode-locked external-cavity laser diode. The experiment can be viewed as an electrical pump-optical probe technique. Picosecond time resolution is achieved by synchronizing the actively mode-locked semiconductor laser to a mode-locked Ti:sapphire laser. The transmission of the Ti:sapphire pulses through the active region of the laser diode is then measured as a function of photon energy and delay time. Our experiment allows to investigate the dynamics of the entire gain spectrum with picosecond time resolution since the Ti:sapphire laser is wavelength tunable. On the basis of these data we are able to determine directly the wavelength dependence of the differential gain. The results compare well with microscopic calculations. The implication for the mode-locking behavior of the diode laser is discussed.
AB - We report a new experimental approach to study the temporal gain dynamics of an actively mode-locked external-cavity laser diode. The experiment can be viewed as an electrical pump-optical probe technique. Picosecond time resolution is achieved by synchronizing the actively mode-locked semiconductor laser to a mode-locked Ti:sapphire laser. The transmission of the Ti:sapphire pulses through the active region of the laser diode is then measured as a function of photon energy and delay time. Our experiment allows to investigate the dynamics of the entire gain spectrum with picosecond time resolution since the Ti:sapphire laser is wavelength tunable. On the basis of these data we are able to determine directly the wavelength dependence of the differential gain. The results compare well with microscopic calculations. The implication for the mode-locking behavior of the diode laser is discussed.
UR - http://www.scopus.com/inward/record.url?scp=0028482841&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0028482841&partnerID=8YFLogxK
U2 - 10.1109/3.301639
DO - 10.1109/3.301639
M3 - Article
AN - SCOPUS:0028482841
VL - 30
SP - 1756
EP - 1762
JO - IEEE Journal of Quantum Electronics
JF - IEEE Journal of Quantum Electronics
SN - 0018-9197
IS - 8
ER -