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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 14 — Jul. 6, 2009
  • pp: 11543–11549

Broadband and high power terahertz pulse generation beyond excitation bandwidth limitation via χ(2) cascaded processes in LiNbO3

Masaya Nagai, Mukesh Jewariya, Yuki Ichikawa, Hideyuki Ohtake, Toshiharu Sugiura, Yuzuru Uehara, and Koichiro Tanaka  »View Author Affiliations


Optics Express, Vol. 17, Issue 14, pp. 11543-11549 (2009)
http://dx.doi.org/10.1364/OE.17.011543


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Abstract

We proposed a novel THz generation technique beyond the limitation of the input optical pulse width, based on phase modulation via cascaded χ(2) process. When intense THz electric field generated by optical rectification lies in electro-optic (EO) crystal, emitted THz field gives phase modulation to the optical excitation pulse. The phase modulation causes excitation pulse narrowing and consequently gives rise to the enhancement of conversion efficiency and THz wave bandwidth broadening. We experimentally realize this generation technique with high χ(2) EO crystal LiNbO3 and with subpicosecond pulse from Yb-doped fiber laser. It opens new concept of THz technologies.

© 2009 Optical Society of America

OCIS Codes
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes

ToC Category:
Nonlinear Optics

History
Original Manuscript: April 28, 2009
Revised Manuscript: June 10, 2009
Manuscript Accepted: June 11, 2009
Published: June 25, 2009

Citation
Masaya Nagai, Mukesh Jewariya, Yuki Ichikawa, Hideyuki Ohtake, Toshiharu Sugiura, Yuzuru Uehara, and Koichiro Tanaka, "Broadband and high power terahertz pulse generation beyond excitation bandwidth limitation via χ(2) cascaded processes in LiNbO3," Opt. Express 17, 11543-11549 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-14-11543


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