research
The Femtosecond Laser Fit Inside the Module
A dispersion-managed photonic circuit produced stable 300-femtosecond pulses at repetition rates previously elusive for integrated sources.
Summary
A dispersion-managed photonic circuit produced stable 300-femtosecond pulses at repetition rates previously elusive for integrated sources.
Researchers combined erbium-implanted silicon-nitride gain waveguides, integrated chirped Bragg gratings and a semiconductor saturable-absorber mirror in a self-starting mode-locked laser. The device generated pulses as short as 300 femtoseconds at 0.5 to 1.2 gigahertz, with thresholds down to 27.3 milliwatts. Co-packaging it with a telecom pump diode yielded an electrical-in, optical-out module. The authors report comb-line stability exceeding commercial fiber lasers by two orders of magnitude; field performance remains to be established beyond this preprint demonstration.
Why it matters
A dispersion-managed photonic circuit produced stable 300-femtosecond pulses at repetition rates previously elusive for integrated sources.
Limits and context
No additional limitation was separately recorded.
Key claims
A dispersion-managed photonic circuit produced stable 300-femtosecond pulses at repetition rates previously elusive for integrated sources.
Evidence: source-2026-08-11-002
Sources
- arXiv preprint 2608.09631arXiv · primary research
Corrections
No corrections have been recorded for this story.