摘要:
L'invention concerne un système d'émission laser bi-fréquence 20 comprenant : un laser dit principal comprenant un milieu amplificateur (AM) disposé dans une cavité C, apte à laser par pompage dans ladite cavité et selon un gain initial G ini (v) fonction d'une fréquence optique, un dispositif de sélection spectrale D ss comprenant : *un milieu moléculaire ou monoatomique M en phase gazeuse disposé dans ladite cavité laser, et *un laser dit d'excitation L ex présentant un longueur d'onde d'excitation Landa ex configurée pour exciter, par absorption optique, un niveau énergétique d'excitation N ex dudit milieu, *ledit milieu étant configuré pour émettre, par désexcitation radiative dudit niveau énergétique d'excitation vers un premier N 1 et un deuxième N 2 niveaux énergétiques de plus base énergie, au moins un doublet de fréquence comprenant une première fréquence V1 associée audit premier niveau N 1 et une deuxième fréquence V2 associée audit deuxième niveau N 2 , le laser d'excitation étant configuré pour que la transition entre un niveau fondamental dudit milieu et ledit niveau énergétique d'excitation soit saturée, et la densité moléculaire ou atomique étant suffisamment élevée, de sorte que ledit gain laser initial G ini (V) soit modifié en un gain laser sélectif G sel(V) par augmentation locale dudit gain laser initial auxdites fréquences V1, V2 dudit doublet.
摘要:
An optical processing system providing a rapid optical response, the system including: a first optical material sensitive to an effective refractive index change under photon absorption; a first optical pump for optically pumping the first optical material at a first frequency so as to cause the first optical material to undergo an effective refractive index change by means of photon absorption; a second optical pump for optically pumping the first optical material at a second frequency so as to cause the first optical material to undergo a rapid second refractive index change by means of stimulated emission.
摘要:
A method for increasing the efficiency of generating lasers by pumping two separate wavelengths into an erbium-based medium to populate the 4 L 11/12 state and depopulate the 4 L 13/2 state. A first excitation wavelength region is located between approximately 955 nm to approximately 1100 nm. The second excitation wavelength region is located between approximately 1600 nm to approximately 1850 nm. This multi-wavelength pumping scheme may be operated in continuous wave or quasi-continuous wave mode.
摘要翻译:一种通过将两个单独的波长泵入基于铒的介质以填充状态并减少 4的方法来提高产生激光的效率的方法 SUP> L 13/2 SUB>状态。 第一激发波长区域位于大约955nm至大约1100nm之间。 第二激发波长区域位于大约1600nm至大约1850nm之间。 该多波长泵浦方案可以以连续波或准连续波模式操作。
摘要:
Devices and methods for providing stimulated Raman lasing are provided. In some embodiments, devices include a photonic crystal that includes a layer of silicon having a lattice of holes and a linear defect that forms a waveguide configured to receive pump light and output Stokes light through Raman scattering, wherein the thickness of the layer of silicon, the spacing of the lattice of holes, and the size of the holes are dimensioned to provide Raman lasing. In some embodiments, methods include forming a layer of silicon, and etching the layer of silicon to form a lattice of holes with a linear defect that forms a waveguide configured to receive pump light and output Stokes light through Raman scattering, wherein the thickness of the layer of silicon, the spacing of the lattice of holes, and the size of the holes are dimensioned to provide Raman lasing.
摘要:
A solid state Raman laser (10) includes a laser pump (20) for producing a first radiation (22) at a high power and at a first wavelength along an optical path, a solid Raman active medium (30) in the optical path of the first radiation, the medium including single crystal diamond (32) having a first surface (34) and a second surface (36), where the first radiation at a high power produces stimulated Raman scattering in the medium and the medium generates a second radiation (38) at a second wavelength, a first optical element (40) in the optical path of the first radiation, wherein the first optical element allows the first wavelength to be transmitted and allows the second wavelength to be reflected, and a second optical element (50) in the optical path of the first radiation, wherein the second optical element allows the first wavelength to be transmitted and allows the second wavelength to be reflected.
摘要:
An optical fibre amplifier including a casing 1 and a pump laser 2 for generating amplifying signals to the optical fibre, the pump laser 2 being mounted on the outside of the casing 1.
摘要:
An integrated photonic apparatus that includes a glass substrate having a major surface, wherein the glass substrate includes a pllurality of regions, each region having a different index of refracton, including a first region having a first index of refraction and a second region having a second index of refraction lower that the first indey of refraction, and a first waveguide formed along the major surface of the substrate, wherein the first waveguide has a higher index of refraction than an intrinsic index o frefraction of adjacent protions of the substrate, and wherein the first waveguide passes through the first region and through the second region of the glass substrate.
摘要:
A semiconductor pump laser comprises a ridge waveguide electro-optical structure, which converts a ridge injection current into light and an integrated wavelength selective facet reflector. This reflector controls the longitudinal modal operation of the pump laser. Specifically, the reflector comprises a first reflective structure for reflecting light to return through the ridge waveguide electro-optical structure. A second reflective structure provides wavelength-selective reflectivity when operating in combination with the first reflective structure. In other words, the phase of light reflected from the first and second reflective structures is such that the net reflectivity of the facet is wavelength selective, or favors certain wavelengths over other wavelengths.
摘要:
Device (100) for use in adding or dropping light signals at predetermined center wavelengths to or from a wavelength division multiplex, fiber optic transmission system. The device (100) includes an evanescent wave coupler having a coupling region (130) formed from two single mode waveguides, the coupling region (130) being formed so that there is substantially complete evanescent field coupling of light from one waveguide to the other in a predetermined wavelength band. Further, the device (100) has a Bragg grating (105) disposed in the coupling region (130) in each of the wavelengths.