Generation of 3.5 nJ femtosecond pulses from a continuous-wave laser without mode locking

Using time-lens compression in a loop configuration, we generate 516 fs pulses at 3.5 nJ pulse energy from a continuous-wave 1.55 mum source without mode locking. Just as a spatial lens can expand or focus a beam in space, so can a time-lens broaden or compress a pulse in time. By placing a time-len...

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Bibliographic Details
Published in:Optics letters 2007-06, Vol.32 (11), p.1408-1410
Main Authors: VAN HOWE, James, LEE, Jennifer H, XU, Chris
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fiber lasers
Fundamental areas of phenomenology (including applications)
Lasers
Nonlinear optics
Optics
Physics
Ultrafast processes
optical pulse generation and pulse compression
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Summary:Using time-lens compression in a loop configuration, we generate 516 fs pulses at 3.5 nJ pulse energy from a continuous-wave 1.55 mum source without mode locking. Just as a spatial lens can expand or focus a beam in space, so can a time-lens broaden or compress a pulse in time. By placing a time-lens in a loop, we maximize the efficiency of bandwidth generation by using one time-lens driven at low power to emulate a stack of many lenses. Our system is compact, is all fiber, and allows large tuning of the repetition rate and continuous tuning of the pulse width and center wavelength.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.32.001408