Patent application number | Description | Published |
20090129410 | Fiber Laser Device Having Excitation Light Source Protection Device - In a fiber laser device equipped with at least a pumping source, a rare-earth element doped fiber and a resonator, there is provided the fiber laser device equipped with a pumping source protecting device that is between the pumping source and the resonator, that prevents a laser light generated by the resonator from being incident on the pumping source, and that has no isolator function. | 05-21-2009 |
20090278056 | ASE LIGHT SOURCE - There is provided, in a light source having at least an excitation light source, a rare-earth doped, fluoride optical waveguide, a multiplexing means and an optical fiber for output, an ASE light source characterized in that an ASE light that has a wavelength shorter than an excitation light and that has been generated by an up-conversion process generated in an inside of the rare-earth doped, optical waveguide is outputted to outside via at least one long-wavelength cut-off device provided inside or outside of an apparatus. | 11-12-2009 |
20100103965 | Light Source Device - A first light source device using a transition element-doped optical waveguide as a light emitter, which is characterized in that a light output end and an excitation light source to excite the transition element-doped optical waveguide are connected to one end of the transition element-doped optical waveguide through an optocoupler and a reflector is connected to the other end of the transition element-doped optical waveguide through a variable attenuator, thereby changing a coherence length of light that is output from the light output end, is provided. | 04-29-2010 |
20100189405 | Optical Loss Device - An optical loss device including an optical fiber is disclosed which is characterized in that the optical loss device includes a loop portion formed by winding the optical fiber in a loop shape at least one turn, and two rotation centers that are located in a plane defined by the loop portion and that face each other, the two rotation centers forming a rotation axis located in the plane, and which is characterized in that a light of wavelength band is attenuated by twisting the loop portion around the rotation axis to vary a shape of the loop portion. | 07-29-2010 |
20100322279 | Multiwaveform Light Source - There is provided a light source apparatus including at least a excitation light source and a photocoupler, a light source medium formed of one kind of a single, rare-earth element doped fiber that is excited by the excitation light source and has two terminals, and an output end formed of an optical fiber, the light source apparatus being characterized in that an optical component having at least one of reflection, branching or attenuation function is provided in anywhere of an optical circuit from the light source medium to the output terminal and that it is possible to output lights of different wavelengths derived from different spontaneous emission light peaks that are generated from rare-earth element ions added to the rare-earth element doped fiber, and that at least one of the lights to be obtained is visible light. | 12-23-2010 |
20110122903 | Wide-Band Wavelength-Variable Laser Device - In a laser apparatus including an excitation light source and a resonator in which a laser medium is disposed between optical paths of a first mirror reflecting light in a desired wavelength band and a second mirror and a first wavelength selecting means is disposed between optical paths of the laser medium and the second mirror, there is provided a wavelength-variable laser apparatus capable of continuously varying the laser oscillation wavelength by using at least a Pr | 05-26-2011 |