Mode coupled Semiconductor Laser with Feedback as an Optoelectronic Oscillator
Patent 13019/TUB

This Invention enables the easier manufacturing of clocks for signals for high frequency data Transmission with less jitter.

  1. Values of jitter 5 times smaller than with state of the art
  2. Length of the feedback loop can be constant or variable
  3. Output of optical and/or electrical pulses possible
Possible Applications

Wireless communications, high-resolution short-range radar systems, clocks in optical communication networks


For wireless communications, high-resolution short-range radar systems and especially clocks in optical communication networks, electrical signals of GHz values with two to three-digits are used more and more. The requirements for their usage as clocks yield enormous challenges, particularly for matching the bit rate of electrical and optical signals.

Technical Description

The invention presented here tackles this problem. For this purpose the source of the optical clock signal is a monolithic integrated mode coupled semiconductor laser. He consists of a gaining section, producing photons by sufficiently high applied voltages, which are getting absorbed in the absorption section and thus inducing an electron hole pair. Just after a short recovery period, new pairs can get induced and the electric resistor can therefore be modulated. A coupling of the amplification and the saturable absorption leads to the formation of pulses in the cavity. An optical feedback loop takes part of the radiation back into the laser. The comb-like laser pulses (urpulse) are affected by temporally jitter, which gets decisively reduced by the invention.

Contact Us

Ina Krüger

Technology Transfer Manager

+49 (0)30 314-75916

Technology Readiness Level

Technology validated in lab

Property Rights

approved: US, FR, CH, DE, GB

Patent Holder

Technische Universität Berlin

Possible Cooperation
  • R&D Cooperation
  • Licensing
  • Patent Purchase