| 摘要 |
PURPOSE: To enable pumping of an optical fiber with a minimum dispersion loss caused by an output wavelength, without the use of additional arrangements by providing a laser material for a holder, in such a manner that an angle between at least one optical axis and a transmission axis is between a specific range. CONSTITUTION: Optical radiation from a pump source 12 is focused on an end 16a of a laser material 16 by a lens 14. Preferably, the laser material 16 is of a solid state and pumped by optical pumping radiation from a laser diode source. The laser material 16 is provided to a holder 20, so that an angle between at least one optical axis and a transmission axis D is between 0 and 90 deg.C, so that the holder when accepting light from the source 12 has an optical spectrum, including a main polarized light dependent spectrum peak at a wavelength nearly equal to the zero-dispersion wavelength of an optical fiber 22. Thereby the laser can pump the optical fiber 22 with a minimum dispersion loss. |
