5-nJ Femtosecond Ti3+:sapphire laser pumped with a single 1 W green diode. (13th April 2018)

• Record Type: Journal Article
• Authors: Muti, Abdullah; Kocabas, Askin; Sennaroglu, Alphan
• Is Part Of: Laser physics letters. Volume 15:Number 5(2018:May)
• Publication Date: 2018-04-13
• Subjects: mode-locked lasers -- diode-pumped solid-state lasers -- rare-earth and transition metal solid-state lasers; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/aaaea7
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: We report a Kerr-lens mode-locked, extended-cavity femtosecond Ti 3+ :sapphire laser directly pumped at 520 nm with a 1 W AlInGaN green diode. To obtain energy scaling, the short x-cavity was extended with a q-preserving multi-pass cavity to reduce the pulse repetition rate to 5.78 MHz. With 880 mW of incident pump power, we obtained as high as 90 mW of continuous-wave output power from the short cavity by using a 3% output coupler. In the Kerr-lens mode-locked regime, the extended cavity produced nearly transform-limited 95 fs pulses at 776 nm. The resulting energy and peak power of the pulses were 5.1 nJ and 53 kW, respectively. To our knowledge, this represents the highest pulse energy directly obtained to date from a mode-locked, single-diode-pumped Ti 3+ :sapphire laser.