Resonant fabry-perot semiconductor saturable absorbers and two photon absorption power limiters
First Claim
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1. A cw mode-locked laser, comprising:
- an optical cavity;
a gain medium within said optical cavity;
a mode-locking element disposed within said cavity; and
a two photon absorber disposed within said cavity.
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Abstract
An intracavity resonant Fabry-Perot saturable absorber (R-FPSA) induces modelocking in a laser such as a fiber laser. An optical limiter such as a two photon absorber (TPA) can be used in conjunction with the R-FPSA, so that Q-switching is inhibited, resulting in laser output that is cw modelocked. By using both an R-FPSA and a TPA, the Q-switched modelocked behavior of a fiber laser is observed to evolve into cw modelocking.
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8 Claims
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1. A cw mode-locked laser, comprising:
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an optical cavity;
a gain medium within said optical cavity;
a mode-locking element disposed within said cavity; and
a two photon absorber disposed within said cavity. - View Dependent Claims (2, 3)
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4. A cw mode-locked laser, comprising:
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an optical cavity;
a gain medium within said optical cavity;
a saturable absorber disposed within said cavity, said saturable absorber having nonlinear absorption characteristics and inducing mode-locked laser pulses; and
a Q-switching suppressor disposed within said cavity.
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5. A cw mode-locked laser, comprising:
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an optical cavity supporting a cw mode-locked signal;
a gain medium within said optical cavity for amplifying said cw mode-locked signal;
a mode-locking element disposed within said cavity; and
a two photon absorber disposed within said cavity. - View Dependent Claims (6, 7)
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8. A cw mode-locked laser, comprising:
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an optical cavity supporting a cw mode-locked signal;
a gain medium within said optical cavity for amplifying said cw mode-locked signal;
a saturable absorber disposed within said cavity, said saturable absorber having nonlinear absorption characteristics and inducing mode-locking of said cw mode-locked laser pulses; and
a Q-switching suppressor disposed within said cavity.
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Specification