Erbium-doped fiber laser for long wavelength band
AssigneeNEOTEK RESEARCH CO., Ltd
InventorsDonghan Lee, Hyunbeom Choi
Life of this patent
Estimating the term…
Abstract
The present invention relates to fiber lasers for long wavelength band. More particularly, the invention relates to an Erbium-doped fiber laser for long wavelength band for lowering lasing threshold and improving the output efficiency by injecting conventional band backward Amplified Spontaneous Emission (ASE) for the design of a laser which lases in 1580 nm band. Specifically, by positioning a reflecting means between an input terminal and the Erbium-doped fiber, some parts of conventional band backward Amplified Spontaneous Emission (ASE) is injected along with the light in long wavelength band and the laser is outputted at a pre-determined wavelength by passing through a tunable wavelength filter.
Claims25
An Erbium-doped fiber laser for long wavelength band, comprising:
- a lasing section for lasing through a stimulated emission of an inputted laser signal;
- a pumping laser generation section for population inverting said lasing section by inputting a pumping laser signal generated to said lasing section;
- a reflecting input section for reflecting the conventional band amplified spontaneous emission signal inputted from said lasing section and passing as well as outputting the laser signal inputted by a feedback to said lasing section;
- a separation transmission section for outputting the laser signal output from said lasing section by allowing the laser signal to pass through one direction;
- a filter section for outputting a specific wavelength by filtering the specific wavelength predetermined from the laser signal inputted from said separation transmission section;
- and
- a feedback output section for outputting the laser signal inputted from said filter section and inputting some parts of the laser signal to said reflecting input section through a feedback.
An Erbium-doped fiber laser for long wavelength band, comprising:
- a lasing section for lasing through a stimulated emission of an inputted laser signal;
- a pumping laser generation section for population inverting said lasing section by inputting a pumping laser beam generated to said lasing section;
- a first linear resonator mirror located at the front end of said pumping laser generation section;
- a second linear resonator mirror located at the rear end of said pumping laser generation section;
- a reflecting input section for reflecting a conventional band Amplified Spontaneous Emission input from said lasing section and re-inputting it;
- a separation transmission section for outputting a long wavelength band laser output generated by lasing from said lasing section by allowing the laser signal to pass through one direction;
- and
- wherein said first linear resonator mirror and second linear resonator mirror resonate in pair for said lasing.
Dependencies are inferred from the claim text.