Labs & TestbedKista High Speed Transmission Lab

Kista High Speed Transmission Lab

Kista High Speed Transmission lab (Kista HST-Lab) is a laboratory for advanced experimentation on systems and components for high speed optical communication jointly operated by RISE Acreo AB and KTH Royal Institute of Technology.  Kista HST-Lab has excellent facilities for experiments on advanced optical transmission systems to meet real life engineering design criteria.

Researchers under joint Acreo-KTH Kista HST-Lab has been continuously working with ultrahigh-speed optical communications in both direct detection and coherent systems, and advanced digital/photonic-assisted signal processing.


  • Extensive research has been devoted to mitigation of semiconductor laser phase/frequency noise and equalization enhanced phase noise in coherent fiber optic transmission systems. Latest results published in Scientific Reports (Nature).
  • Achieved high-speed intensity modulation and direct detection system demonstration with higher than 100 Gbps on-off keying (OOK) and 4/8 pulse amplitude modulation (PAM) with ultra-broadband distributed feedback externally modulated laser (DFB-EAM) having 100 GHz 3-dB bandwidth with 2 dB ripple.
  • Researchers from joint Acreo-KTH Kista HST-Lab has contributed to:
    • Record high-speed THz photonic-wireless transmission demonstration with up to 300 Gbps data rate. Results published in IEEE Photonics Conference post-deadline session.
    • Real time 100 Gbaud three level duobinary signaling with InP-based integrated externally modulated laser (EML) for optical interconnect applications. Results published in ECOC2016 post-deadline session.


Collaboration under joint Acreo-KTH Kista HST-Lab within several European/National level projects have resulted in more than 10 highly educated PhDs and Postdocs. Kista HST-Lab supports and encourage researchers independent research initiatives leading to technology transfer to active industry players allowing to create innovative products.


The laboratory is fully equipped for advanced high speed transmission system experiments, including the following equipment:

  • analog signal generator up to 67 GHz
  • 56 Gbaud bit pattern generator
  • digital to analog converter up to 40 GHz
  • several units of 100 GHz DFB-EAM and a unit of 100 GHz photodetector
  • two units of 50 GSa/s arbitrary waveform generators
  • broadband quadrature amplitude modulation transmitter module up to 400 Gbit/s
  • broadband optical IQ-modulators
  • 44 GHz coherent receiver
  • digital storage oscilloscope up to 80 GSa/s and 33 GHz analog bandwidth
  • high power external cavity lasers
  • optical fiber links with optical amplifiers (Raman, erbium doped fiber)
  • optical and electrical spectrum analyzers
  • A fully developed lab automation routine based on MATLAB for efficient optimization and measurements.

With the equipment, it is possible to perform advanced end-to-end system experiments, such as:

  • Serial binary electrical data generation as well as optical intensity modulation and direct detection up to 116 Gbit/s (58 Gbaud 4 PAM, 35 Gbaud 8 PAM and high bitrate DMT)
  • Coherent signal transmission in dual polarizations using multilevel modulation formats (56 Gbaud QPSK, 32/64 Gbaud square 16/64-QAM, circular 16/64-QAM and beyond) as well as OFDM
  • Analysis of algorithms for signal impairment mitigation and detection using digital/photonic assisted signal processing
  • Very high speed optical transmission and photonic/polymer components at 400 Gbit/s on a single wavelength





Contact at RISE Acreo

Anders Berntson, Department Manager
anders.berntson [at], +46 (0)70 208 47 61

Jonas Mårtensson, Senior Project Manager
jonas.martensson [at], +46 70 336 35 52

Dr. Oskars Ozolins, Senior Scientist
oskars.ozolins [at], +46 72 557 02 09

Contact at KTH

Docent Richard Schatz, Senior Researcher
rschatz [at], +46 8 790 40 69

Dr. Xiaodan Pang, Researcher
xiaodan [at], +46 70 539 71 61


Gunnar Jacobsen
Deputy Department Manager
+46 (0)70 278 83 97
gunnar.jacobsen [at]

Aditya Kakkar
EU Marie Curie Doctoral Researcher
+46 8 790 42 62
aditya.kakkar [at]

Jie Li
Senior Scientist
+46 (0)70 792 77 46 [at]

Jonas Mårtensson
Senior Project Manager
+46 70 336 35 52
jonas.martensson [at]

Oskars Ozolins
Senior Scientist-Technical Lead
+46 72 557 02 09
oskars.ozolins [at]

Aleksejs Udalcovs
Postdoctoral Fellow
+46 (0) 70 217 52 19
Aleksejs.Udalcovs [at]