摘要:
A light source for Raman amplification to Raman-amplify signal light includes: plural incoherent light sources that output incoherent light; plural pumping light sources that output second-order pumping light; an optical fiber for Raman amplification to Raman-amplify the incoherent light with the second-order pumping light, and outputs the amplified incoherent light; and an output unit connected to the optical transmission fiber, receiving the amplified incoherent light, and outputting the amplified incoherent light as first-order pumping light having a wavelength that Raman-amplifies the signal light to the optical transmission fiber.
摘要:
A power supply and circuitry system for powering HVPT devices includes a power supply circuit that selectively provides an operating power and a simmer power to multiple HVPT devices. The system also includes a trigger circuit for each respective HVPT device that selectively couples the power supply circuit to one HVPT device to provide the operating power thereto. The system also includes a simmer control circuit for selectively coupling the power supply circuit to the HVPT devices to provide the simmer power thereto, the simmer control circuit further including a simmer switch circuit for each HVPT device, wherein each simmer switch circuit comprises an input coupled to the power supply circuit to receive the simmer power therefrom and an output coupled to one HVPT device. The simmer control circuit also further includes a simmer drive circuit coupled to each simmer switch circuit for selectively enabling the simmer switch circuits.
摘要:
This invention provides a solution for operating a regenerative amplifier using a single electro-optical device, such as a Pockels cell. An efficient cavity geometry of a regenerative amplifier is provided for enabling pulse selection, coupling and releasing to an output by operating a single Pockels cell unit placed essentially in the middle of the optical cavity, between two polarizers, whereas a first polarizer is used for release of an amplified pulse and a second polarizer is used for injection of seed pulses and release of at least one of waste amplified pulses and seed pulses. One side of the cavity, with respect to the location of said Pockels cell, includes an empty space, whereas the other side is provided with a gain medium, which is pumped by a pump source. The regenerative amplifier of such optical design is both efficient and cost effective. The single electro-optical unit works both as the control unit for operating the regenerative amplifier and as an output pulse picker unit.
摘要:
An optical amplifier includes a rare-earth doped optical fiber for receiving input light through one end and outputting output light through another end, the input light being input from an input port; an excitation light source for generating excitation light; an optical coupler for supplying the generated excitation light to the one end and/or the another end of the rare-earth doped optical fiber; and a reflector for reflecting an amplified spontaneous emission light out of a signal band traveling in opposite direction to the input light, the amplified spontaneous emission light being generated in the rare-earth doped optical fiber.
摘要:
This invention relates to the field of lasers and in particular to the pump sources used in lasers. Many existing lasers use linear flashlamps in order to create population inversion in the gain medium of the laser. Such pump sources suffer from a number of drawbacks particularly when pumping dye lasers including explosive damage, long optical pulse length and inappropriate spectral emission. This invention provides a pump source for a laser which exploits the surface discharge phenomenon. A dielectric material (1) which is in contract with a gas (9) has electrical energy discharged across its surface in order to provide an electromagnetic emission which is then used to pump the gain medium. By varying the dielectric material or the cover gas used (amongst other variables) the surface emission can be used to pump the laser gain medium.
摘要:
An optically active device comprising an optical fiber, a light source and a coupler is disclosed. The optical fiber has a core made of a silicate glass containing Rb and/or Cs oxide. The core is doped with Nd.sup.3+ as an active ion and transmits light at 1.3 .mu.m band. The light source generates excitation light at 0.8 .mu.m. The coupler directs the excitation light from the light source into the core of the optical fiber. A signal light or a spontaneous light at 1.3 .mu.m band which is transmitted in the core stimulates Nd.sup.3+ to emit light at 1.3 .mu.m band. As a result an optical function such as optical amplification can be effected at 1.3 .mu.m band.
摘要:
In an optical communication system with a fiber-optic amplifier which includes a wavelength-selective fiber-optic coupler for coupling pump light into the amplifying length of fiber, an additional optical signal, e.g., a service-channel signal, is transmitted from the location of the fiber-optic amplifier in one direction or the other by being used to modulate the pump light. Since the pump light is not completely absorbed in the amplifying length of fiber, a sufficient portion is transferred from the length of fiber into the optical waveguide of the optical communication system and passes down the optical waveguide to the end point of the communication system. There, it is coupled out and passed to an optical receiver from whose output the transmitted additional signal is recovered by demodulation. To prevent the modulation of the pump light from modulating the amplification brought about by the amplifying length of fiber, the additional signal is modulated onto a carrier wave of sufficiently high frequency, and the resulting signal is used to modulate the pump light.
摘要:
A minilaser device exhibiting both laser and non-linear optical effects. The device includes a single laser crystal bar of NYAB which inhibits non-linear characteristics and serves as a self-frequency-doubling crystal having the laser and non-linear optical effects, and a pumping source for the device to generate laser light.
摘要:
A laser (1) has its laser head (3) connected to its base (2) by hinges having a common axis (R) parallel to the laser beam axis (4a). When the lamp for energizing the laser rod must be replaced, the head (3) can be pivoted about the axis (R) to a position in which the lamp can easily be removed from its cavity and a new lamp fitted therein, the removal and fitting being accomplished by moving the lamps along their axis (5a).
摘要:
A lighting device is provided for emitting superradiant fluorescent light. First material layers are provided which emit predetermined electromagnetic waves of spontaneous emission when supplied with a predetermined energy (e.g. a pumping ray or beam). Second material layers, transparent to the electromagnetic wave, are stacked between the layers of the first material. To provide an improved light emission, the second material layers are arranged so that the interspaces l between the first material layers are smaller than c.multidot..tau..sub.R, where c is the velocity of said electromagnetic wave and .tau..sub.R is a time constant of the spontaneous emission.
摘要翻译:提供照明装置用于发射超射线荧光。 提供第一材料层,其在被提供预定能量(例如泵浦射线或射束)时发出预定的自发发射的电磁波。 层叠在第一材料的层之间的对电磁波透明的第二材料层。 为了提供改进的发光,第二材料层被布置成使得第一材料层之间的间隙1小于cx tau R,其中c是所述电磁波的速度,τR是自发发射的时间常数 。