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Pulse-amplitude equalization using a polarization-maintaining laser resonator.

Young Min Jhon1, Young Tae Byun, Deok Ha Woo

  • 1Photonics Research Center, Korea Institute of Science and Technology, Seoul, Korea.

Optics Letters
|August 29, 2006
PubMed
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Researchers achieved pulse-amplitude equalization for rational-harmonically mode-locked fiber laser pulses. This novel method, using a polarization-maintaining resonator, controls pulse distribution without extra devices.

Area of Science:

  • Optics and Photonics
  • Laser Physics
  • Fiber Lasers

Background:

  • Mode-locked fiber lasers generate ultrashort pulses.
  • Rational-harmonic mode-locking (RHML) offers flexible repetition rate multiplication.
  • Controlling pulse amplitude distribution in RHML lasers is challenging.

Purpose of the Study:

  • To experimentally demonstrate pulse-amplitude equalization in a rational-harmonically mode-locked fiber ring laser.
  • To investigate the control of pulse amplitude distribution using modulator driving power.
  • To achieve stable, equalized pulses at high repetition rates.

Main Methods:

  • Utilized a polarization-maintaining fiber ring laser resonator.
  • Employed a modulator driving power control mechanism.

Related Experiment Videos

  • Operated the laser in the linear region of the modulator.

    • Main Results:

    • Successfully demonstrated pulse-amplitude equalization for the first time in this laser configuration.
    • Achieved stable, equalized pulses with controllable amplitude distribution.
    • Obtained pulse-amplitude-equalized pulses at repetition rates of 20, 30, and 40 GHz.

    Conclusions:

    • Pulse-amplitude equalization is feasible in rational-harmonically mode-locked fiber ring lasers.
    • Modulator driving power is an effective parameter for controlling pulse amplitude.
    • This technique enables stable, high-repetition-rate pulse generation without additional optical components.