Generation of synchronized picosecond pulses by a 1.06-μm gain-switched laser diode for stimulated Raman scattering microscopy

Kyoya Tokunaga, Yi Cheng Fang, Hiroyuki Yokoyama, Yasuyuki Ozeki

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We propose that a gain-switched laser diode (GS-LD) can be used as a picosecond laser source for stimulated Raman scattering (SRS) microscopy. We employed a 1.06-μm GS-LD to generate ∼13-ps pulses at a repetition rate of 38 MHz and amplified them to >100 mW with Yb-doped fiber amplifiers. The GS-LD was driven by 200-ps electrical pulses, which were triggered through a toggle flip-flop (T-FF) so that the GS-LD pulses were synchronized to Ti:sapphire laser (TSL) pulses at a repetition rate of 76 MHz. We found the timing jitter of GS-LD pulses to be approximately 2.7 ps in a jitter bandwidth of 7 MHz. We also show that the delay of electrical pulses can be less sensitive to the optical power of TSL pulses by controlling the threshold voltage of the T-FF. We demonstrate the SRS imaging of polymer beads and of HeLa cells with GS-LD pulses and TSL pulses, proving that GS-LD is readily applicable to SRS microscopy as a compact and stable pulse source.

Original languageEnglish
Pages (from-to)9617-9628
Number of pages12
JournalOptics Express
Volume24
Issue number9
DOIs
Publication statusPublished - 2016 May 2

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Fingerprint Dive into the research topics of 'Generation of synchronized picosecond pulses by a 1.06-μm gain-switched laser diode for stimulated Raman scattering microscopy'. Together they form a unique fingerprint.

Cite this