Laser element doped with rare earth ions, optical amplifier element doped with rare earth ions and rare-earth-ion-doped short-wavelength laser light source apparatus
US5426656A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1994 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | Jan 24, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2302/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The optical fiber is doped at the core thereof with Tm ions and Nd ions. When light at a wavelength in a 800-nm band for exciting the Nd ions, is incident upon the optical fiber through an incident portion thereof, the Nd ions emit light at a wavelength in the vicinity of 1,012 .mu.m. Through three excitations by absorption of light emitted from the Nd ions and/or energy transfer from the Nd ions, the Tm ions experience three excitation transitions and reach a third high energy level through first and second high energy levels. Thereafter, the Tm ions experience a radiative transition from the third high energy level, thereby to emit blue light at a wavelength of 480 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.