An injection-seeded nanosecond terahertz (THz) wave parametric generator was demonstrated using nonlinear crystals that were pumped by a single frequency Nd:yttrium–aluminum–garnet laser. Spectrum narrowing to the Fourier transform limit (ν=1.58 THz, Δν<200 MHz) was achieved by injection seeding the idler wave (near-infrared Stokes). This resulted in a THz-wave output power (900 pJ/pulse, >100 mW peak) approximately 300 times higher than that of a conventional THz-wave parametric generator, which has no injection seeder. This compact system operates at room temperature and promises to be a widely tunable THz-wave source that will compete with free-electron lasers and p-Ge lasers.

1.
K.
Kawase
,
M.
Sato
,
T.
Taniuchi
, and
H.
Ito
,
Appl. Phys. Lett.
68
,
2483
(
1996
).
Google Scholar
 
2.
K.
Kawase
,
M.
Sato
,
K.
Nakamura
,
T.
Taniuchi
, and
H.
Ito
,
Appl. Phys. Lett.
71
,
753
(
1997
).
Google Scholar
 
3.
J.
Shikata
,
K.
Kawase
,
M.
Sato
,
T.
Taniuchi
, and
H.
Ito
,
Opt. Lett.
24
,
202
(
1999
).
Google Scholar
 
4.
M. A.
Piestrup
,
R. N.
Fleming
, and
R. H.
Pantell
,
Appl. Phys. Lett.
26
,
418
(
1975
).
Google Scholar
 
5.
K.
Suto
and
J.
Nishizawa
,
IEEE J. Quantum Electron.
QE–19
,
1251
(
1983
).
Google Scholar
 
6.
S.
Wu
,
V. A.
Kapinus
, and
G. A.
Blake
,
Opt. Commun.
159
,
74
(
1999
).
Google Scholar
 
7.
J.
Shikata
,
K.
Kawase
,
K.
Karino
,
T.
Taniuchi
, and
H.
Ito
,
IEEE Trans. Microwave Theory Tech.
48
,
653
(
2000
).
Google Scholar
 
8.
K.
Kawase
,
J.
Shikata
,
H.
Minamide
,
K.
Imai
, and
H.
Ito
,
Appl. Opt.
40
,
1423
(
2001
).
Google Scholar
 
9.
T.
Nozokido
,
J. J.
Chang
,
C. M.
Mann
,
T.
Suzuki
, and
K.
Mizuno
,
Int. J. Infrared Millim. Waves
15
,
1851
(
1994
).
Google Scholar
 
10.
K.
Imai
,
K.
Kawase
,
J.
Shikata
,
H.
Minamide
, and
H.
Ito
,
Appl. Phys. Lett.
78
,
1026
(
2001
).
Google Scholar
 
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2001
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