Min Jiang

US Patent:

6819694, Nov 16, 2004

Filed:

Dec 15, 2000

Appl. No.:

09/738373

Inventors:

Min Jiang - Ann Arbor MI
Donald J. Harter - Ann Arbor MI
Gregg D. Sucha - Manchester MI
Martin E. Fermann - Ann Arbor MI

Assignee:

Imra America, Inc. - Ann Arbor MI

International Classification:

H01S 308

US Classification:

372 44

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.

US Patent:

6956887, Oct 18, 2005

Filed:

Dec 15, 2000

Appl. No.:

09/738372

Inventors:

Min Jiang - Ann Arbor MI, US
Donald J. Harter - Ann Arbor MI, US
Gregg D. Sucha - Manchester MI, US
Martin E. Fermann - Ann Arbor MI, US

Assignee:

Imra America, Inc. - Ann Arbor MI

International Classification:

H01S003/08

US Classification:

372 99, 372 25, 372 11, 372 41, 430321

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.

US Patent:

7453913, Nov 18, 2008

Filed:

Aug 5, 2005

Appl. No.:

11/197852

Inventors:

Min Jiang - Ann Arbor MI, US
Donald J. Harter - Ann Arbor MI, US
Gregg D. Sucha - Manchester MI, US
Martin E. Fermann - Ann Arbor MI, US

Assignee:

IMRA America, Inc. - Ann Arbor MI

International Classification:

H01S 3/098

US Classification:

372 18, 372 10

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.

US Patent:

7933300, Apr 26, 2011

Filed:

Nov 4, 2008

Appl. No.:

12/264804

Inventors:

Min Jiang - Ann Arbor MI, US
Donald J. Harter - Ann Arbor MI, US
Gregg D. Sucha - Manchester MI, US
Martin E. Fermann - Ann Arbor MI, US

Assignee:

IMRA America, Inc. - Ann Arbor MI

International Classification:

H01S 3/098

US Classification:

372 18, 372 11, 372 92

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.

US Patent:

8036253, Oct 11, 2011

Filed:

Mar 21, 2011

Appl. No.:

13/052782

Inventors:

Min Jiang - Ann Arbor MI, US
Donald J. Harter - Ann Arbor MI, US
Gregg D. Sucha - Manchester MI, US
Martin E. Fermann - Ann Arbor MI, US

Assignee:

IMRA America, Inc. - Ann Arbor MI

International Classification:

H01S 3/113

US Classification:

372 11, 372 10, 372 6, 372 18

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.

US Patent:

62528920, Jun 26, 2001

Filed:

Sep 8, 1998

Appl. No.:

9/149368

Inventors:

Min Jiang - Ann Arbor MI
Donald J. Harter - Ann Arbor MI
Gregg D. Sucha - Manchester MI
Martin E. Fermann - Ann Arbor MI

Assignee:

Imra America, Inc. - Ann Arbor, MI

International Classification:

H01S 3113

US Classification:

372 11

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.

US Patent:

60349751, Mar 7, 2000

Filed:

Mar 9, 1998

Appl. No.:

9/040252

Inventors:

Donald J. Harter - Ann Arbor MI
Martin E. Fermann - Ann Arbor MI
Min Jiang - Ann Arbor MI

Assignee:

Imra America, Inc. - Ann Arbor MI

International Classification:

H01S 3098

US Classification:

372 18

Abstract:

The output power of a passively modelocked fiber laser is increased by distributing optical losses throughout the cavity. The laser cavity includes a saturable absorber and a polarizing element that serves as the output coupler, and these are positioned on opposite sides of the fiber gain medium. The pump light is preferably injected towards the side of the laser cavity that includes the saturable absorber. The laser cavity compensates for polarization drifts and is environmentally stable.