-
[show abstract]
[hide abstract]
ABSTRACT: An ultrashort-pulses mode-locked ytterbium-doped fiber laser has been developed with 28.3 fs duration at 80 MHz. The dispersion was compensated by a grating pair inside the cavity and a prism pair outside the cavity.
Lasers and Electro-Optics, 2008 and 2008 Conference on Quantum Electronics and Laser Science. CLEO/QELS 2008. Conference on; 06/2008
-
[show abstract]
[hide abstract]
ABSTRACT: Passive timing stabilization of Er-doped fiber laser was demonstrated by injection of reference pulses, resulting in a timing jitter of 3.7 fs in a frequency range from 1 Hz to 100 kHz.
Lasers and Electro-Optics, 2007. CLEO 2007. Conference on; 06/2007
-
[show abstract]
[hide abstract]
ABSTRACT: We describe a design and a construction of a TW-class 12-fs Ti:sapphire chirped-pulse amplification system. We developed a broadband pulse stretcher, a broadband gain-narrowing compensator, broadband high-energy mirrors, high-energy dichroic chirped mirrors, a dispersion compensator, and a broadband pulse compressor for ∼10-fs pulse generation. Utilizing these optical devices, we demonstrated a generation of 12-fs pulses from a 10-Hz-repetition-rate Ti:sapphire chirped-pulse multipass amplifier system and a 1-kHz-repetition-rate Ti:sapphire chirped-pulse regenerative amplifier system. Optimized designs of broadband Ti:sapphire amplifiers with multilayer gain-narrowing compensators and an adaptive dispersion compensator with a spatial light modulator contribute to the shorter pulse amplification.
IEEE Journal of Selected Topics in Quantum Electronics 04/2006; · 3.78 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: We have achieved long-term phase locking among multicolor femtosecond pulses by using an optical parametric oscillator and a two-wavelength laser consisting of Ti:sapphire and Cr:forsterite lasers for an attosecond pulse train generation by Fourier synthesis.
LEOS Summer Topical Meetings, 2005 Digest of the; 08/2005
-
[show abstract]
[hide abstract]
ABSTRACT: We demonstrated control of full electric-field shapes of optical pulses by combining a carrier-envelope-phase stabilized chirped-pulse amplification system with a pulse-shaper that controls both the carrier-envelope phase and the pulse envelope.
Lasers and Electro-Optics, 2005. (CLEO). Conference on; 06/2005
-
[show abstract]
[hide abstract]
ABSTRACT: We demonstrated a timing jitter as low as 83 as between passively-synchronized Ti:sapphire and Cr:forsterite mode-locked lasers from 10 mHz to 100 kHz in combination with a slow active extra-cavity feedback control by use of the balanced cross-correlator.
Lasers and Electro-Optics, 2005. (CLEO). Conference on; 06/2005
-
[show abstract]
[hide abstract]
ABSTRACT: We measured effects of beam pointing shift on the carrier-envelope phase measurement by self-referencing spectral interferometry method using hollow-core fibers or a sapphire plate for spectral broadening.
Quantum Electronics and Laser Science Conference, 2005. QELS '05; 06/2005
-
[show abstract]
[hide abstract]
ABSTRACT: We have fixed an optical phase relation among femtosecond subharmonic pulses, and observed interferometric fringes by a video. The estimated phase noise by a movie guaranteed out-of-loop Fourier synthesis of them for long time.
Lasers and Electro-Optics, 2004. (CLEO). Conference on; 06/2004
-
[show abstract]
[hide abstract]
ABSTRACT: The authors studied the measurement and control of relative carrier-envelope-offset phases among femtosecond light pulses whose optical frequencies have a subharmonic relation. They report the fluctuation dynamics of the phases and their control of two types of passive pulse-timing synchronized systems: passively synchronized mode-locked Ti:sapphire and Cr:forsterite lasers and a femtosecond subharmonic optical parametric oscillator. These techniques will facilitate Fourier synthesizing among subharmonic pulses in order to realize subfemtosecond pulse-train generation in the visible and infrared regions.
IEEE Journal of Selected Topics in Quantum Electronics 08/2003; · 3.78 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: We demonstrate stretch and recompression of a sub-10-fs pulse utilizing a broadband pulse stretcher, a dispersion compensator with a spatial light modulator, and a broadband pulse compressor for ~10-fs Ti:sapphire chirped-pulse amplification system. Our calculation suggests that the dispersion compensator is useful for dispersion compensation of a Ti:sapphire chirped-pulse amplification system, including multi-pass amplifiers.
Applied Physics B 05/2002; 74:s253-s257. · 2.19 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: Summary form only given. In this paper, we present a novel synchronized technique based on the fs KLM Ti:sapphire and Cr:forsterite lasers, in which timing jitter of less than 1 fs was demonstrated within the measurement accuracy. The schematic of the experimental setup consists of prism dispersion controlled KLM Ti:sapphire and Cr:forsterite lasers. In order to induce a strong nonlinear coupling effect for synchronization, we used two pairs of D-shaped concave mirrors to focus and cross both laser beams inside the Ti:sapphire crystal. With 5 W 532 nm and 9 W 1064 nm pump lasers, stable mode-locking powers of 600 mW and 150 mW were produced from the Ti:sapphire and Cr:forsterite lasers, respectively.
Lasers and Electro-Optics, 2002. CLEO '02. Technical Digest. Summaries of Papers Presented at the; 02/2002
-
[show abstract]
[hide abstract]
ABSTRACT: Measurement and control of the cartier-envelope phase (CEP) of high-intensity few-cycle laser pulses are required to precisely control the nonlinear interactions. The beat signal between the fundamental and its second harmonic, was used as the feedback signal to control the slip of the CEP of femtosecond laser oscillators. Here, we report the first measurement of the changes of the CEP on a single-shot basis. Spectral interferometry (SI) between the white-light continuum and its second harmonic was used for the single-shot measurement of the CEP. We consider a pulse with a broad spectrum ranges over one octave containing the red component (840 nm) and the blue component (420 nm).
Lasers and Electro-Optics, 2001. CLEO '01. Technical Digest. Summaries of papers presented at the Conference on; 06/2001
