Frequency modulated photonic crystal lasers

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Frequency modulated photonic crystal lasers
Frequency modulated photonic crystal lasers

University: University of St Andrews

Sector(s): Electronics, Sensors & Photonics

About Opportunity:

Conventional optical links combine narrow spectral linewidth lasers with long broad band optical modulators. These invariably consume large amounts of energy – a fundamental physical constraint of this approach and require custom-made power-hungry electrical drivers. Our new Silicon Photonics (SiP+) technology-based system is dramatically simpler in its implementation than the conventional competing approaches.

The SiP+ laser employs a revolutionary method that sees the laser wavelength automatically locked to an ultra-low capacitance PhC resonator that provides direct modulation. The laser is built around a large mode area optical waveguide platform enabling a modular structure that provides high performance Wavelength Division Multiplexing (WDM) capabilities and very efficient fibre coupling. This leads to a dramatic reduction in the amount of energy consumed and is compatible with standard off-the-shelf electronic drivers, thus reducing costs. Our “game-changing” technology allows transceivers to operate within the 40-1000Gbps range in a simplified and cost-effective manner and with an efficient power budget.

Key Benefits:

  • Tunable lasers for Continuous Wave and direct Frequency Modulation
  • Hybrid integration of Indium Phosphide, optical amplifier and silicon photonic crystal
  • Low capacitance photonic crystal based tuning element
  • Wavelength defined by photonic crystal
  • Efficient power budget


  • Transceivers operating at up to 1 Terabit/s

IP Status:

UK patent application No 1418637.3 covering the CW and FM photonics crystal laser technology.


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