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US 6,819,694 B2Granted
Resonant fabry-perot semiconductor saturable absorbers and two photon absorption power limiters
AssigneeImra America, Inc.
InventorsMin Jiang, Donald J. Harter, Gregg D. Sucha, Martin E. Fermann
Life of this patent
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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.
Claims8
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.
2 more elements
A cw mode-locked laser, comprising:
- 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.
2 more elements
A cw mode-locked laser, comprising:
- 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.
2 more elements
A cw mode-locked laser, comprising:
- 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.
2 more elements
Dependencies are inferred from the claim text.