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Related Experiment Videos

Self-starting mode locking by multi-spatial-mode active waveguiding.

Weiguo Yang1

  • 1Data/Optical Networks Research, Bell Laboratories, Lucent Technologies, Inc. 791 Holmdel-Keyport Road, Holmdel, New Jersey 07733, USA. wgyang@lucent.com

Optics Letters
|July 13, 2006
PubMed
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We show a new way to achieve self-starting mode locking in semiconductor lasers using spatial effects. This compact laser operates at 1.54 micrometers with 47 GHz repetition rate and sub-5 ps pulses.

Area of Science:

  • Optics and Photonics
  • Semiconductor Lasers
  • Ultrafast Lasers

Background:

  • Mode locking is crucial for generating ultrashort laser pulses.
  • Traditional mode locking often requires complex setups or external components.
  • Semiconductor lasers offer compact and cost-effective solutions for laser applications.

Purpose of the Study:

  • To demonstrate a novel self-starting mode-locking principle in semiconductor laser diodes.
  • To utilize spatial effects from multi-spatial-mode active waveguiding for saturable loss.
  • To develop a compact and efficient ultrafast semiconductor laser source.

Main Methods:

  • Implementation of a compact semiconductor laser diode.
  • Utilizing multi-spatial-mode active waveguiding.

Related Experiment Videos

  • Leveraging spatial effects to provide saturable loss for self-starting mode locking.

    • Main Results:

    • Achieved self-starting mode locking in a semiconductor laser.
    • Operated at a 1.54 micrometer wavelength.
    • Demonstrated a repetition rate of 47 GHz.
    • Generated pulses with a width below 5 picoseconds.
    • Obtained an average output power of nearly 0 dBm coupled to single-mode fiber.

    Conclusions:

    • The demonstrated principle enables self-starting mode locking in compact semiconductor lasers.
    • Spatial effects in multi-spatial-mode waveguiding are effective for saturable loss.
    • The device is a promising source for applications requiring high-repetition-rate, ultrashort pulses at 1.54 micrometers.