Abstract

We propose a new method for the chirped pulse spectrum shaping, which is significant in chirped pulse amplification (CPA) system to compensate the gain narrowing and the gain saturation, to obtain the shortest compressed pulse, and to improve the signal-to-noise ratio (SNR) of the output, while simultaneously increasing the amplifier efficiencies. This method is based on a grating system to decompose the chirped pulse spectrum to a spatial space, a microstructure on a multilayer dielectric thin film as a functional reflector to shape the space distribution, and a synthesis system to compose this space distribution to a shaped frequency chirped pulse before incidence into the next amplifier stage. The results show that the damage threshold by the high-power laser can be enhanced, and this functional reflector can be fabricated in an easy and cheap way, in which the accuracy in lithography is 1μm, the etching tolerance is 35 nm, and the roughness of the etching surface is 8.5 nm. In addition, the phase aberration is less than 12 mrad in the chirped bandwidth of a few tens of nanometers, and the spatial distribution of the final output almost remains. The studies show that the energy integral of the output chirped pulse is extracted 17% and 29.5% more with center and off-center modulations, respectively, compared with the normal amplification. Moreover, the SNR has enhanced to 1010:1 at 10 ps after spectrum shaping, which enhances the SNR near 1–2 orders than that without the spectrum shaping.

© 2010 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
High-spatiotemporal-quality petawatt-class laser system

Hiromitsu Kiriyama, Mori Michiaki, Yoshiki Nakai, Takuya Shimomura, Hajime Sasao, Momoko Tanaka, Yoshihiro Ochi, Manabu Tanoue, Hajime Okada, Shuji Kondo, Shuhei Kanazawa, Akito Sagisaka, Izuru Daito, Daisuke Wakai, Fumitaka Sasao, Masayuki Suzuki, Hideyuki Kotakai, Kiminori Kondo, Akira Sugiyama, Sergei Bulanov, Paul R. Bolton, Hiroyuki Daido, Shunichi Kawanishi, John L. Collier, Cristina Hernandez-Gomez, Chris J. Hooker, Klaus Ertel, Toyoaki Kimura, and Toshiki Tajima
Appl. Opt. 49(11) 2105-2115 (2010)

Demonstration of a 1.1 petawatt laser based on a hybrid optical parametric chirped pulse amplification/mixed Nd:glass amplifier

Erhard W. Gaul, Mikael Martinez, Joel Blakeney, Axel Jochmann, Martin Ringuette, Doug Hammond, Ted Borger, Ramiro Escamilla, Skylar Douglas, Watson Henderson, Gilliss Dyer, Alvin Erlandson, Rick Cross, John Caird, Christopher Ebbers, and Todd Ditmire
Appl. Opt. 49(9) 1676-1681 (2010)

Suppression of the pedestal in a chirped-pulse-amplification laser

Y.-H. Chuang, D. D. Meyerhofer, S. Augst, H. Chen, J. Peatross, and S. Uchida
J. Opt. Soc. Am. B 8(6) 1226-1235 (1991)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (20)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription