摘要:
In a method of amplifying optical input signals over a wide bandwidth, the optical input signals are applied to an optical waveguide made from a rare-earth-doped amorphous yttrium aluminum oxide material (e.g., erbium-doped yttrium aluminum oxide material). The optical input signals include optical signals having wavelengths shorter than 1,520 nanometers and optical signals having wavelengths longer than 1,610 nanometers. Preferably, the wavelengths range from as short as approximately 1,480 nanometers to as long as approximately 1,650 nanometers. Pump light is applied to the optical waveguide to cause the waveguide to provide optical gain to the optical input signals. The optical gain causes the optical signals to be amplified within the waveguide to provide amplified optical signals over the extended range from approximately 1,480 nanometers to approximately 1,650 nanometers, including, in particular, optical signals having wavelengths shorter than 1,520 nanometers and optical signals having wavelengths longer than 1,610 nanometers. Alternatively, the wavelengths of the optical input signals may be in the range from approximately 1,480 nanometers to approximately 1,565 nanometers. As a further alternative, the wavelengths of the optical input signals may be in the range from approximately 1,565 nanometers to approximately 1,650 nanometers.
摘要:
An all-solid-state tunable pulse laser using titanium-doped sapphire single crystal (10) in which a pumping source is a pulse beam which is produced by doubling with a KTiOPO₄ (5) under a 90° phase matching condition a Q-switching laser pulse of a light beam which is produced by a transition of ⁴F 3/2 → ⁴I 11/2 in a neodymium-doped yttrium aluminum perovskite crystal (3) pumped with a quasi-continuous diode laser.
摘要:
The present invention relates to a switchable dual wavelength solid state laser with a solid state gain medium (1) which is selected to emit optical radiation at a first wavelength with a first polarization and of at least a second wavelength with a second polarization different from said first polarization when optically or electrically pumped. A polarizing device (7) is arranged within the laser cavity, said polarizing device (7) being adjustable at least between said first and said second polarization. The two end mirrors (2, 3) of the laser cavity are designed to allow lasing of the solid state laser at the first wavelength when the polarizing device (7) is adjusted to the first polarization, and to allow lasing of the solid state laser at the second wavelength when the polarizing device (7) is adjusted to the second polarization. The proposed solid state laser allows an easy switching between two emission wavelengths. The polarizing device (7) is for example realized by a combination of a Pockels cell (8) and a polarizer (9). End mirrors (2, 3) suppress unwanted wavelengths and a beam clump (10) absorbs the radiation not fed-back in the resonator.
摘要:
An apparatus providing pulsed emission of a laser beam (6) and comprising a laser rod (1), devices (2, 3) providing pulsed excitation of the laser rod (1) so that said rod delivers light radiation, a resonator (4, 5) placed on either side of the rod (1) for emitting laser light radiation, and devices for selecting the wavelength of the emitted laser light radiation. Said selection devices (4, 5) are designed to promote the emission of light radiation at a wavelength of 1.34 νm, so that hard and soft tissue may be heated.
摘要:
The present invention relates to a solid-state laser comprising a gain medium (6) of a solid-state host material which is co-doped with Ce3+-ions and ions of a further rare-earth material. The host material is selected such that a lower edge of the 5d band of the Ce3+-ions is energetically higher than an upper lasing state of the ions of the further rare-earth material. This laser can be optically pumped by GaN laser diodes (4) in the wavelength region between 400 and 450 nm and emits laser radiation in the visible wavelength range. With this laser, in particular, a GaN diode laser pumped solid-state laser emitting in the green wavelength region can be realized.
摘要:
The invention relates to an apparatus for the pulsed emission of a laser beam (6), said apparatus comprising : a laser bar (2) mounted in an optical cavity consisting of a crystal of neodymium-doped yttrium and aluminium oxide; selection means (4, 5) for enhancing the laser beam emission at a wavelength of 1.34 mm; a pump lamp (10) mounted in the optical cavity and contiguous with the laser bar; excitation means (11) for supplying the pump lamp (10) so that it can produce intermittent light emissions. According to the invention, the pulse signal (S) generated by the excitation means (11) for supplying the pump lamp (10), includes for each pulse (I) at least one first hashing pulse (i) having a duration (ti) which is longer than the duration of the following hashing pulses belonging to the same pulse.
摘要:
A nonlinear Yb:YAB laser material is disclosed. The material is capable of generating fundamental o-polarized first wavelength laser light and frequency doubled e-polarized second wavelength laser light, the material being oriented for type 1 phase matching of the first wavelength laser light. Also disclosed is a laser system. The system comprises a pumping light source (102) emitting a pumping beam of light, a laser cavity (114) having an input coupler (108) operatively disposed with respect to the light source (102) so as to couple the pumping beam of light into the cavity (114), and a nonlinear Yb:YAB laser material (105) capable of lasing in response to a pumping beam of light thereby generating fundamental o-polarized first wavelength laser light and frequency doubled e-polarized second wavelength laser light, the material being oriented for type 1 phase matching of the first wavelength laser light, the first wavelength laser light being in the range of 1020-1100 nm and the second wavelength laser light being in the range of 510-550 nm. The input coupler (108) comprises a reflector to at least partially reflect the first wavelength laser light and the second wavelength laser light into the cavity (114), and the laser cavity (114) further includes an output coupler (111) for coupling and outputting at least the second wavelength laser light from the cavity (114) as an output laser beam. Also disclosed are methods of providing an output laser beam and methods of using the beam.
摘要:
An all-solid-state tunable pulse laser using titanium-doped sapphire single crystal (10) in which a pumping source is a pulse beam which is produced by doubling with a KTiOPO₄ (5) under a 90° phase matching condition a Q-switching laser pulse of a light beam which is produced by a transition of ⁴F 3/2 → ⁴I 11/2 in a neodymium-doped yttrium aluminum perovskite crystal (3) pumped with a quasi-continuous diode laser.
摘要:
The present application discloses a double-clad crystal fiber which includes a Yb-doped CALGO core region, a pump cladding region configured to have the core region positioned therein, and a second cladding region configured to have the core region and pump cladding region positioned therein.
摘要:
A nonlinear Yb:YAB laser material is disclosed. The material is capable of generating fundamental o-polarized first wavelength laser light and frequency doubled e-polarized second wavelength laser light, the material being oriented for type 1 phase matching of the first wavelength laser light. Also disclosed is a laser system. The system comprises a pumping light source (102) emitting a pumping beam of light, a laser cavity (114) having an input coupler (108) operatively disposed with respect to the light source (102) so as to couple the pumping beam of light into the cavity (114), and a nonlinear Yb:YAB laser material (105) capable of lasing in response to a pumping beam of light thereby generating fundamental o-polarized first wavelength laser light and frequency doubled e-polarized second wavelength laser light, the material being oriented for type 1 phase matching of the first wavelength laser light, the first wavelength laser light being in the range of 1020-1100 nm and the second wavelength laser light being in the range of 510-550 nm. The input coupler (108) comprises a reflector to at least partially reflect the first wavelength laser light and the second wavelength laser light into the cavity (114), and the laser cavity (114) further includes an output coupler (111) for coupling and outputting at least the second wavelength laser light from the cavity (114) as an output laser beam. Also disclosed are methods of providing an output laser beam and methods of using the beam.