Header menu link for other important links
X
Mode unlocking characteristics of an RF detuned actively mode-locked fiber ring laser
Shree Krishnamoorthy,
Published in Elsevier B.V.
2019
Volume: 431
   
Pages: 39 - 44
Abstract
An actively mode-locked laser (AMLL) is subjected to RF modulation frequency detuning away from its fundamental resonant frequency. The standard theoretical model of mode-locked lasers is extended with perturbative analysis and injection locking theory. The proposed model shows that with increasing detuning, the number of modes with phase-lock decreases. For a mode n, the injection range Rn is found to decrease as n−1, thus making higher modes more susceptible to unlocking by RF detuning. Experimental verification of these theoretical predictions is obtained by using a custom built Yb 3+ doped fiber based ring AMLL. The AMLL operates at 1064nm, with a repetition rate of f0=26.69MHz. The unlocking of modes is studied in the electrical domain by varying the RF detuning over a range of ±13kHz with a step-size of 130Hz. The locking limits of a mode decrease as n−1 as predicted by the theory. The fundamental mode (n=1) has an injection range of 143.4kHz, with the higher modes, n>1, having smaller injection ranges as predicted by the theory. © 2018 Elsevier B.V.
About the journal
JournalData powered by TypesetOptics Communications
PublisherData powered by TypesetElsevier B.V.
ISSN00304018
Open AccessNo
Concepts (15)
  •  related image
    Fiber lasers
  •  related image
    LASER MODE LOCKING
  •  related image
    Laser theory
  •  related image
    Lasers
  •  related image
    Natural frequencies
  •  related image
    Ring lasers
  •  related image
    ACTIVE MODE LOCKING
  •  related image
    Actively mode-locked lasers
  •  related image
    Experimental verification
  •  related image
    FUNDAMENTAL RESONANT FREQUENCIES
  •  related image
    INJECTION LOCKED LASERS
  •  related image
    LOCKING RANGE
  •  related image
    MODE-LOCKED LASER
  •  related image
    Theoretical modeling
  •  related image
    Mode-locked fiber lasers