Abstract:
PROBLEM TO BE SOLVED: To provide a compact amplifier of a high energy and super short light pulse. SOLUTION: This system is achieved by a light pulse amplification and emission system consisting of a pump light source 100 which generates a light pump pulse having a preliminarily dertermined wide, a signal light source 130 generating a light signal pulse, a combining optical system 160 which receives the light pump pulse and the light signal pulse to combine them and is for supply the combined light pulses, a parametric amplifier 170 which is consisting of a quasi-phase-matched crystal amplifying the light signal pulse by using the energy of the light pump pulse while receiving the combined light pulses and an application unit which receives the amplified output of the amplifier and applies it to a clearly expressed position. Preferably, this system is composed of a chirped pulse amplification and emission system consisting of the light pulse amplification and emission system and a compressor 180 which receives the light signal pulse amplified in the parametric amplifier and compresses it.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of stabilizing a short pulse fiber laser which reduces a timing jitter caused by a variation in environmental condition such as vibration, air disturbance, a change in temperature to a minimum. SOLUTION: The method of stabilizing a short pulse fiber laser has a segregating step which segregates the fiber lasers 210 and 220 from an outside environment, a winding step which winds the fiber lasers 210 and 220 around a fiber spool 280, and an operating step which operates the fiber lasers 210 and 220 while the fiber lasers 210 and 220 are wound around the fiber spool 280. The fiber lasers 210 and 220 are wound around the fiber spool 280 and segregated from the outside environment, and therefore become free of influences of the variation in environmental condition and are stabilized. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To reduce to the minimum timing jitter caused by variations in environmental condition such as vibrations, disturbance of air, change in temperature. SOLUTION: Two lasers are configured by using the an identical component in an identical container so as to be pumped by the same pump laser while maintaining a state in which the two lasers can be controlled independently. In particular, in the case of a fiber laser, two fibers are wound together around the same shaft (spool). COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a method for stabilizing a short pulse fiber laser capable of reducing timing jitter caused by variations in an environmental condition such as vibration, the disturbance of air, a change in temperature to a minimum. SOLUTION: The method for stabilizing the short pulse fiber laser has a segregating step which segregates the fiber laser from an outside environment, a twisting step which twists the fiber laser around a fiber spool, and an operating step which operates the fiber laser while the fiber laser has been twisted around the fiber spool. The fiber laser is stabilized without the influence of the variations in the environmental condition, since the fiber laser is winded around the fiber spool, and segregated from the outside environment. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a method and a device for time scanning using super short pulse width laser generating by minimum (micron) mechanical operation and provide a method for calibrating with high accuracy timing of the order of femtosecond. SOLUTION: The cavity length of one 620 of two lasers 610 and 620 is given a swing with a piezoelement PZT. Fabry-Perot etalon FP produces a timing pulse line from a single pulse of laser 610. A correlator 640 correlates the timing pulse line and the gate pulse from the laser 620 and produces a calibration time scale, which can be applied much in the field requiring a high grade high speed scanning and time calibration. For example, it can be applied for surface measurement, charge dynamics measurement of semiconductor, electric optical test of ultrahigh speed electron/photoelectric device, reflectivity measurement in optical time region, electric-optical sampling/oscilloscope, etc.
Abstract:
PROBLEM TO BE SOLVED: To suppress a Q-switch pulse by disposing a first and a second reflectors on the counterposed ends of a gain medium, disposing a third reflector apart from the first reflector in a resonator, and further disposing a saturable absorber between Fabry-Perot etalons. SOLUTION: A first reflector 42a and a second reflector 38a for forming an optical resonator 20a are disposed on the counterposed ends of a fiber gain medium 10a such as an Er-doped light amplifying fiber of an integrated saturable absorber/optical power limiter. Then, a beam splitter 64a as a third reflector apart from the first reflector 42a is disposed in the optical resonator 20a to form a Fabry-Perot etalon nearly resonant at laser frequency. A saturable absorber 34a for inducing a mode locked laser pulse is disposed between the Fabry-Perot etalons.
Abstract:
PROBLEM TO BE SOLVED: To provide a means transmitting a very short light pulse with a high peak power to a required point in an optical device. SOLUTION: This very short light pulse transmitting device is provided with a pulse expander 20 receiving the super-short light pulse with a high peak power and expanding its pulse width and an optical fiber 30 transmitting the light pulse over a required distance and having the dispersion compensating other dispersion so that the light pulse is re-compressed sufficiently in the required point in the optical device 50. The pulse width of the light pulse is expanded by the expander 20, and a chirp light pulse with a low peak power is formed. Thus pulse whose dispersion is compensated while it is transmitted through the optical fiber 30, and is re-compressed by the optical fiber 30 or a compressor 40 to be transmitted to the optical device 50. Since the peak power in the optical fiber 30 is small, the super-short light pulse hardly by affected by a nonlinear effect.
Abstract:
The feeder of ultra short optical pulses with high peak power to an optical apparatus (50) comprises a pulse expander (20), receiving the ultra short optical pulses and expanding the width of the impulses. An optical fibre (30) transmits the optical pulses over a required length. The fibre has a dispersion which compensates other dispersions appearing in the optical apparatus, and affecting the optical pulses for complete recompression of the pulses at a desired point of the optical apparatus. Preferably the expander is of the type containing a chirped optical fibre Bragg grid, a refraction grid pair, or a pair of prisms. The optical fibre is of the monomode type.
Abstract:
Modengekoppelter Laser, mit: einem Verstärkungsmedium (10a); ersten und zweiten Reflektoren (38a, 42a), die an gegenüberliegenden Enden des Verstärkungsmediums (10a) zur Ausbildung eines optischen Resonators (20a) angeordnet sind; einem dritten Reflektor (36a), der innerhalb des Resonators (20a) angeordnet ist und von dem ersten Reflektor (42a) zur Ausbildung eines Fabry-Perot-Etalons beabstandet ist; und einem sättigbaren Absorber (34a) mit nichtlinearen Absorptionseigenschaften, der modengekoppelte Laserimpulse induziert, wobei der Absorber (34a) innerhalb des Fabry-Perot-Etalons angeordnet ist und der Absorber eine Dicke aufweist, so dass sich das Fabry-Perot-Etalon bei der Laserfrequenz annähernd in Resonanz befindet.