A confocal, reflection-double-pass, Ti:sapphire continuous-wave (cw) amplifier with a small signal gain of 4.2 has been invented. Femtosecond pulses with an 82 MHz repetition rate from a mode-locked Ti:sapphire laser are amplified to 5.77 W average power with a slightly saturated gain of 3.7 through an amplifier pumped by three cw green lasers, and the extraction efficiency reaches 10.6%.

1.
W. S.
Pelouch
,
P. E.
Powers
, and
C. L.
Tang
,
Opt. Lett.
17
,
1070
(
1992
).
2.
D.
Kopf
and
U.
Keller
,
Opt. Lett.
22
,
99
(
1997
).
3.
D. Kopf and U. Keller, in Advanced Solid-State Lasers, Technical Digest (Optical Society of America, Washington, DC, 1997), p. 126.
4.
J.
Aus der Au
,
F. H.
Loesel
,
F.
Morier-Genoud
,
M.
Moser
, and
U.
Keller
,
Opt. Lett.
23
,
271
(
1998
).
5.
G. J. Spuhler, T. Sudmeyer, R. Paschotta, and U. Keller, in Advanced Solid-State Lasers, Technical Digest (Optical Society of America, Washington, DC, 2000), paper TuC2.
6.
Z.
Liu
,
S.
Izumida
,
S.
Ono
,
H.
Ohtake
, and
N.
Sarukura
,
Appl. Phys. Lett.
74
,
3622
(
1999
).
7.
J. D.
Kafka
,
M. L.
Watts
, and
J. W.
Pieterse
,
J. Opt. Soc. Am. B
12
,
2147
(
1995
).
8.
P. Deng, Q. Zhang, F. Gan, N. Sarukura, Z. Liu, and Y. Segawa, in Advanced Solid-State Lasers, Technical Digest (Optical Society of America, Washington, DC, 1994), paper AMB3.
9.
R. J.
Ellingson
and
C. L.
Tang
,
Opt. Lett.
18
,
438
(
1993
).
10.
N.
Sarukura
,
H.
Ohtake
,
S.
Izumida
, and
Z.
Liu
,
J. Appl. Phys.
84
,
654
(
1998
).
11.
E. N.
Glezer
and
E.
Mazur
,
Appl. Phys. Lett.
71
,
882
(
1997
).
This content is only available via PDF.
You do not currently have access to this content.