Mode-locking of a terahertz laser by direct phase synchronization.
J. Maysonnave,Kenneth Maussang,Joshua R. Freeman,Nathan Jukam,Julien Madéo,P. Cavalié,R. Rungsawang,Suraj P. Khanna,Edmund H. Linfield,Alexander Giles Davies,Harvey E. Beere,David A. Ritchie,Sukhdeep Dhillon,Jérôme Tignon +13 more
TL;DR: A novel scheme to achieve mode-locking of a multimode laser by multimode injection seeding with an external terahertz pulse, resulting in phase mode-locked terAhertz laser pulses of 9 ps duration, characterized unambiguously in the time domain.
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Abstract: A novel scheme to achieve mode-locking of a multimode laser is demonstrated. Traditional methods to produce ultrashort laser pulses are based on modulating the cavity gain or losses at the cavity roundtrip frequency, favoring the pulsed emission. Here, we rather directly act on the phases of the modes, resulting in constructive interference for the appropriated phase relationship. This was performed on a terahertz quantum cascade laser by multimode injection seeding with an external terahertz pulse, resulting in phase mode-locked terahertz laser pulses of 9ps duration, characterized unambiguously in the time domain.
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Citations
Phase-resolved measurement and control of ultrafast dynamics in terahertz electronic oscillators
Takashi Arikawa,Jaeyong Kim,Toshikazu Mukai,Naoki Nishigami,Masayuki Fujita,Tadao Nagatsuma,Kōichiro Tanaka +6 more
TL;DR: Researchers develop photonic technology to precisely control ultrafast terahertz waveforms, enabling phase-resolved measurement and dynamic phase control of electronic oscillators, crucial for next-generation wireless communications (6 G and beyond).
2
Observation of time-resolved gain dynamics in a terahertz quantum cascade laser
Sergej Markmann,Hanond Nong,Shovon Pal,Negar Hekmat,Reshma A. Mohandas,Paul Dean,Lianhe Li,Edmund H. Linfield,A. Giles Davies,Andreas D. Wieck,Nathan Jukam +10 more
- 28 Aug 2015
TL;DR: In this paper, the dynamic response of a terahertz quantum cascade laser is probed as a function of time, and the gain of the laser is saturated by injection seeding the laser with an initial THz seed pulse.
Double-pulse injection seeding of a terahertz quantum cascade laser
Sergej Markmann,Hanond Nong,Shovon Pal,Negar Hekmat,Sven Scholz,Nadezhda Kukharchyk,Arne Ludwig,Sukhdeep Dhillon,Jérôme Tignon,Xavier Marcadet,Claudia Bock,Ulrich Kunze,Andreas D. Wieck,Nathan Jukam +13 more
- 12 Nov 2015
TL;DR: In this paper, double-pulse injection seeding is used to modify the spectral emission of a terahertz quantum cascade laser (THz QCL) using two broad-band pulses delayed in time imprinting a modulation on the single THz pulse spectrum.
Modifying the spectral emission of a terahertz quantum cascade laser with double pulse injection seeding
Sergej Markmann,Hanond Nong,Shovon Pal,Negar Hekmat,Sven Scholz,Nadezhda Kukharchyk,Arne Ludwig,Sukhdeep Dhillon,Jérôme Tignon,Xavier Marcadet,Claudia Bock,Ulrich Kunze,Andreas D. Wieck,Nathan Jukam +13 more
- 05 Jun 2016
TL;DR: In this article, a terahertz quantum cascade laser (QCL) is injected with two board-band THz pulses, and the time-delay between the THZ pulses can be varying.
Quantum cascade lasers: a versatile source for precise measurements in the mid/far-infrared range
TL;DR: In this article, the authors provide an overview of recent developments of quantum cascade lasers (QCLs), from the mid-infrared (mid-IR) to the far-IR (THz) range, with a special focus on their metrological-grade applications in a number of fields.
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