Timing Jitter Characterization of a Free-Running SESAM Mode-locked VECSEL
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Date
2011-08
Publication Type
Journal Article
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Abstract
We present timing jitter measurements of an InGaAs quantum well vertical external cavity surface emitting laser (VECSEL) passively mode locked with a quantum dot semiconductor saturable absorber mirror (SESAM) at 2-GHz repetition rate. It generates 53-mW average output power in 4.6-ps pulses at 953 nm. The laser housing was optimized for high mechanical stability to reduce acoustic noise. We use a fiber-coupled multimode 808-nm pump diode, which is mounted inside the laser housing. No active cavity length stabilization is employed. The phase noise of the free-running laser integrated over a bandwidth from 100 Hz to 1 MHz corresponds to an RMS timing jitter of ≈212 fs, which is lower than previously obtained for mode-locked VECSELs. This clearly confirms the superior noise performance expected from a high-Q-cavity semiconductor laser. In contrast to edge-emitting semiconductor diode lasers, the cavity mode is perpendicular to the quantum well gain layers, which minimizes complex dispersion and nonlinear dynamics.
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published
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Volume
3 (4)
Pages / Article No.
658 - 664
Publisher
IEEE
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Subject
Photon sources; Diode-pumped lasers; Infrared lasers; Mode-locked lasers; Semiconductor lasers; Ultrafast lasers
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03371 - Keller, Ursula (emeritus) / Keller, Ursula (emeritus)