Optical fiber laser
This patent describes an optical fiber laser comprising: a gain cavity including a single mode optical fiber of given length and index of refraction and a cladding surrounding the core and having an index of refraction lower than that of the core. The core comprising a host material having incorporated therein a predetermined concentration of just erbium oxide having a fluorescence spectrum with a peak emission line at 1.54 micrometers; filter means optically coupled to each end of the fiber gain cavity for providing feedback in the cavity at the peak emission line of the erbium oxide and for permitting energy to be introduced into the cavity at the absorption band of the erbium oxide in the region of 1.45 to 1.53 micrometers; and a laser diode optically coupled to one end of the core for pumping energy into the end of the gain cavity so that the gain cavity oscillates at just the peak emission line.
- Assignee:
- Polaroid Corp., Cambridge, MA
- Patent Number(s):
- US 4780877
- OSTI ID:
- 6474459
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420300* -- Engineering-- Lasers-- (-1989)
AMPLIFICATION
CHALCOGENIDES
DESIGN
EMISSION
ENERGY-LEVEL TRANSITIONS
ERBIUM COMPOUNDS
ERBIUM OXIDES
FIBER OPTICS
FIBERS
FILTERS
FLUORESCENCE
GAIN
LASER CAVITIES
LASERS
LUMINESCENCE
OPTICAL FIBERS
OPTICAL FILTERS
OPTICAL PUMPING
OXIDES
OXYGEN COMPOUNDS
PUMPING
RARE EARTH COMPOUNDS
REFRACTION
STIMULATED EMISSION