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Differential absorption spectroscopy for gas monitoring at sub-millimeter wavelengths
P.Y. Han;G. Sucha;D. Harter;A. Galvanauskas;M. Li;X.-C. Zhang
A differential absorption spectroscopic system is developed for gas monitoring at sub-millimeter wavelengths. Tunable, narrowband terahertz (THz) pulse trains are generated using optical pulse trains obtained by an adjustable pulse shaping technique. By tuning the THz frequency at or away from the resonant frequency, differential data are obtained to determine the water vapor concentration. After ...Show More
1-THz bandwidth C- and L-band optical sampling with a bit rate agile timebase
R.L. Jungerman;G. Lee;O. Buccafusca;Y. Kaneko;N. Itagaki;R. Shioda;A. Harada;Y. Nihei;G. Sucha
A fast optical sampling system operating over a wide range of wavelengths and modulation bit rates is needed for characterizing high-speed communications signals. In this letter, a 1-THz bandwidth optical sampling system using sum frequency generation with a 780-nm sampling pulse is demonstrated. This covers the C- and L-bands with no wavelength holes near the sampling wavelength. A novel electric...Show More
Generation and interaction of parabolic pulses in high gain fiber amplifiers and oscillators
A.C. Peacock;V.I. Kruglov;B.C. Thomsen;I.D. Harvey;M.E. Fermann;G. Sucha;D. Harter;I.M. Dudley
OFC 2001. Optical Fiber Communication Conference and Exhibit. Technical Digest Postconference Edition (IEEE Cat. 01CH37171)
Year: 2001 | Conference Paper |
THz generation and detection using 1550-nm pulses from a fiber laser
M. Li;G. Sucha;P.-Y. Han;A. Galvanaoskas;D. Harter;X.-C. Zhang
Conference on Lasers and Electro-Optics (CLEO 2000). Technical Digest. Postconference Edition. TOPS Vol.39 (IEEE Cat. No.00CH37088)
Year: 2000 | Conference Paper |
Cited by: Patents (1)
Summary form only given.We have demonstrated THz emission and detection using a 1550-nm fiber laser. The phase-matching condition of DAST and GaAs were studied, as well as the electro-optical properties of a GaAs sensor for free space THz wave detection.Show More
Highly efficient, low-noise Yb femtosecond fiber source
M.E. Fermann;M.L. Stock;A. Galvanauskas;A. Hariharan;G. Sucha;D. Harter;L. Goldberg
Conference on Lasers and Electro-Optics (CLEO 2000). Technical Digest. Postconference Edition. TOPS Vol.39 (IEEE Cat. No.00CH37088)
Year: 2000 | Conference Paper |
Cited by: Patents (6)
Summary form only given. With the recent availability of Raman-shifted, widely tunable Er fiber laser pulse sources, the direct injection of Yb fiber amplifiers with femtosecond pulses from a frequency-converted Er-fiber laser has become possible. The exploitation of the unique efficiency and large bandwidth of Yb fiber amplifiers thus allows the construction of highly compact ultrafast laser sour...Show More
Summary form only given. We report a new mode-locking mechanism, where the use of a two-photon absorber in addition to a saturable absorber allows for CW mode-locking to reliably evolve from Q-switched mode locking. An optimal design of the two-photon absorber limits the peak power of the Q-switched pulses via optical limiting and thus aids in preventing damage to the saturable absorber. Moreover,...Show More
Noise considerations for ultrafast measurements
Conference Proceedings. LEOS'98. 11th Annual Meeting. IEEE Lasers and Electro-Optics Society 1998 Annual Meeting (Cat. No.98CH36243)
Year: 1998 | Conference Paper |
Cited by: Papers (1)
The effects of timing jitter of modelocked lasers are considered with regard to ultrafast measurement systems. To evaluate performance, a new time-domain method is used to measure timing jitter for a pair of modelocked Er:fiber lasers.Show More
Summary form only given. The recent development of ultra low-noise mode-locked fiber lasers with nearly quantum-limited timing jitter promises great advancements in the realm of high-precision measurement systems employing femtosecond lasers. However, as lasers with lower and lower timing jitter are being developed, there is clearly a need for methods that can measure the timing jitter more accura...Show More
Summary form only given. We present results of a study of nonlinear dynamics in a cw-pumped, Kerr-lens mode-locked (KLM) laser with gain aperturing. Previous to this work, the only measurements of nonlinear dynamics in ultrafast laser systems have been performed in additive pulse modelocked (APM) systems. These revealed a variety of interesting dynamics, however the APM's reliance on interferometr...Show More
Rapid temporal scanning of ultrafast lasers
CLEO '97., Summaries of Papers Presented at the Conference on Lasers and Electro-Optics
Year: 1997 | Conference Paper |
First Page of the Article
Show MoreA new method for rapid temporal scanning of ultrafast lasers
Using an identical pair of passively mode-locked fiber lasers, we demonstrate a new method of temporal scanning by periodically varying the cavity length of one laser. This scanning temporal ultrafast delay (STUD) technique produces scanning performance far exceeding that obtainable with conventional, mechanical scanning: For a pair of 5-MHz lasers, we obtain a scan range of /spl Delta/T=10 ns at ...Show More
Monolithic polarization-insensitive passively mode-locked fiber laser
M. Hofer;M.H. Ober;R. Hofer;G.A. Reider;K. Sugden;I. Bennion;M.E. Fermann;G. Sucha;D. Harter;C.A.C. Mendonca;T.H. Chiu
Summary form only given. Fiber lasers have by now become popular sources for short optical pulses. Triggered by the need for compact sources for telecommunication: turn-key operation with somewhat complex packages has recently been achieved. The use of fiber lasers as true 'power supplies' for short optical pulses, however, requires an extremely rugged, unsophisticated design. Indeed we demonstrat...
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First Page of the Article
Show MoreSynchronization of environmentally coupled, passively mode-locked fiber lasers
Summaries of papers presented at the Conference on Lasers and Electro-Optics
Year: 1996 | Conference Paper |
Cited by: Papers (1)
Summary form only given. Synchronization of mode-locked lasers has become a subject of increasing interest lately due to the utilization of ultrafast lasers in communications systems, pump-probe measurements, and other applications. Commercial systems have been developed for synchronizing mode-locked Ti:sapphire lasers to an external source or to other mode-locked lasers. Here, we report the synch...Show More
Generation of high-power femtosecond pulses near 1.5 mu m using a color-center laser system
The authors have developed a high-power F-center laser system capable of generating femtosecond pulses with energies exceeding 50 pJ at wavelengths near 1.5 mu m. Short pulses (140 fs) from an additive-pulse mode-locked NaCl laser are amplified in a multipass NaCl amplifier at kilohertz repetition rates. The system can generate peak powers approaching 500 MW, with wavelengths tunable from 1.52 to ...Show More
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