Title:
METHOD FOR ORGANIZING A MODE-LOCKED PULSE TRAIN BY PUMP MODULATION
Document Type and Number:
WIPO Patent Application WO2003077420
Kind Code:
A3
Abstract:
The present invention describes a method to achieve stabilization of the repetition rate in a passive harmonic mode-locked fiber laser employing semiconductor saturable absorbers. The pulse organization is accomplished by electrically modulating the amplifier pump source that in turn optically modulates the saturable loss of semiconductor absorber. Moreover owing on an efficient modulation mechanism of the cavity loss, the method can be used to generate an actively mode-lock pulse train. The invention offers the advantages of an actively modulated mode-locked laser while maintaining the simplicity and the cost effectiveness of a passive mode-locked system. We expect that this approach combined with the use of regenerative modulation technique and polarization-maintaining fiber components will permit the generation of the dropout-free pulse trains at gigahertz repetition rates with good long-term stability and minimal cost.
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Inventors:
OKHOTNIKOV OLEG (FI)
GUINA MIRCEA (FI)
GUINA MIRCEA (FI)
Application Number:
PCT/FI2003/000173
Publication Date:
December 04, 2003
Filing Date:
March 07, 2003
Export Citation:
Assignee:
OPTOELECTRONICS RES CT (FI)
OKHOTNIKOV OLEG (FI)
GUINA MIRCEA (FI)
OKHOTNIKOV OLEG (FI)
GUINA MIRCEA (FI)
International Classes:
H01S3/067; H01S3/098; H01S3/102; (IPC1-7): H01S3/098; H01S3/067
Domestic Patent References:
| WO2001005004A1 | 2001-01-18 |
Foreign References:
| US5414725A | 1995-05-09 | |||
| US20020048078A1 | 2002-04-25 |
Other References:
See also references of EP 1490932A2
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