Fiber laser
AssigneeFujikura Ltd.
InventorTomoharu Kitabayashi
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Abstract
A fiber laser of an MOPA type includes an MO which is a laser oscillator for generating seed light, a PA which is a light amplifier connected to a rear stage of the MO, for amplifying and outputting laser light emitted from the MO, and a reflection device which is provided between the MO and the PA. According to the present invention, the MOPA type fiber laser can decrease the peak value of the pulse which is emitted toward the MO or the pump light source by self-oscillation or reflection, and makes it unlikely that the pump light source or the MO will be damaged.
Claims11
A fiber laser of an MOPA type comprising:
- an MO which is a laser oscillator for generating seed light;
- a PA which is a light amplifier connected to a rear stage of the MO, for amplifying and outputting laser light emitted from the MO;
- and
- a reflection device which is provided between the MO and the PA.
A fiber laser of an MOPA type comprising:
- an MO which is a laser oscillator for generating seed light;
- and
- a PA which is a light amplifier connected to a rear stage of the MO, for amplifying and outputting laser light emitted from the MO,
- wherein the PA is composed from a photocoupler, which includes a pumping port in which pump light from a pump light source is coupled, a signal port in which laser light from the MO is coupled, and an emission port through which pump light from the pumping port and signal light from the signal port are combined and emitted;
- a pump light source which is connected to the pumping port;
- and a rare earth-doped optical fiber which is connected to the emission port, and
- wherein a reflection device is provided at an output port of the photocoupler.
Dependencies are inferred from the claim text.