Starting dynamics of a cw passively mode-locked picosecond Ti:sapphire/DDI laser

Journal Article · Sun Jan 15 04:00:00 EST 1995 · Optics Letters

DOI:https://doi.org/10.1364/OL.20.000163· OSTI ID:165071

Pu, N; Shieh, J; Lai, Y; Pan, C ^[1]

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1. Institute of Electro-optical Engineering, National Chiao Tung University, Hsinchu 300 (Taiwan)

We show that, for a cw passively mode-locked picosecond Ti:sapphire/DDI laser, the first autocorrelation trace with negligible cw background occurs at a delay time of 20{mu}s, or 1600 round trips from the first relaxation-oscillation peak. The trace suggests that the pulse consists of a primary pulse as short as 4.4 ps and of small secondary pulses that form a much wider pedestal of the trace, each containing {approx}50% of the photon energy. Nearly transform-limited {approx}5-ps-wide Gaussian pulses were observed at a delay time of 40 {mu}s. After 45 {mu}s, the optical spectrum broadened considerably, and the time--bandwidth product increased to 4 in the steady state (after 60 {mu}s).

• Sponsoring Organization: USDOE
• OSTI ID: 165071
• Journal Information: Optics Letters, Journal Name: Optics Letters Journal Issue: 2 Vol. 20; ISSN OPLEDP; ISSN 0146-9592
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DESIGN
EMISSION SPECTRA
NEAR INFRARED RADIATION
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PULSE TECHNIQUES
SOLID STATE LASERS
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