Broadband amplification of 800-nm pulses with a combination of negatively and positively chirped pulse amplification

Mikhail P. Kalashnikov, Karoly Osvay, I. M. Lachko, H. Schönnagel, W. Sandner

Research output: Contribution to journalArticle

6 Citations (Scopus)


It is experimentally proved that successive amplification of negatively and positively chirped laser pulses (NPCPA) counteracts the gain narrowing effect typical in chirped pulse amplification (CPA) lasers. The scheme is robust and easy to adopt to even petawatt (PW) level high power laser systems. As a demonstration, a multi-terawatt (TW) Thsapphire laser system was modified to the NPCPA. The bandwidth of the 150 mJ output pulses exceeds 50 nm without any additional spectral correction, which is 30% broader than those currently available from conventional CPA lasers. Moreover, the NPCPA scheme gives an opportunity to increase an intensity temporal contrast without any compromise in pulse energy.

Original languageEnglish
Pages (from-to)194-200
Number of pages7
JournalIEEE Journal on Selected Topics in Quantum Electronics
Issue number2
Publication statusPublished - Mar 1 2006



  • Chirped pulse amplification (CPA)
  • Femtosecond lasers
  • Gain narrowing
  • High peak power lasers

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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