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Characterization Optical signal generation and analysis

Oscilloscopes, signal generators and detectors


Location: Tampere University (TAU), Espoo, Oulu, Tampere
Contact persons: Piotr Ryczkowski (Tampere), Mikko Närhi (Tampere), Markku Kapulainen (Espoo), Antti Tanskanen (Oulu)
Wavelength: NIR (700 nm - 1200 nm)

Finnlight has various high-speed oscilloscopes coupled with high speed photodetectors for testing fast light transient phenomena. The devices also include optical signal generating modules for telecom testing, i.e. bit-error rate testers (BERT), pulse pattern generators and network analyzers.

Utilizing dispersive optical fibers single-shot spectral measurements can be performed at MHz repetition rates by utilizing the time-stretch dispersive Fourier transform technique ( ).

Oscilloscopes &  network analyzers

  • 33 GHz real time oscilloscope Tektronix DPO73304DX, Real time oscilloscope, 33 GHz bandwidth (2 channels), 20 GHz (all 4 channels in use),100GS/s readout speed, 250 M-samples per channel memory (contact Piotr Ryczkowski)
  • 20 GHz real time oscilloscope Tektronix DSA72004, 20GHz bandwidth, 4 channels, 50 GS/s, 80 MS shared between channels memory (contact Mikko Närhi)
  • Field programable Data Array (FPGA) National Instruments, PXIe-5774 FlexRIO Digitizer x2, 12-bits, 6.4 GS/s, NI PKI-5402 14-Bit 20MHz FGEN   (contact Piotr Ryczkowski)
  • 2 GHz real time oscilloscope LeCroy WaveRunner 204i, 2 GHz bandwidth, 10GS/s (2 channels), 5GS/s(4 channels) (contact Piotr Ryczkowski)
  • 1 GHz real time oscilloscope Keysight InfiniiVision, 1 GHz bandwidth,  5 GS/s, two channels (contact Piotr Ryczkowski)
  • Keysight Sampling oscilloscope, 0.1-32 GHz (contact Markku Kapulainen)
  • Anritsu Vector Network analyzer, 40 MHz – 40 GHz (contact Markku Kapulainen)
  • Agilent (Keysight) DCA-X 86100D,  sampling oscilloscope 100 GHz (contact Antti Tanskanen)

Fast photodetectors

  • RXM42AF 45 kHz-42 GHz amplified photodetector (Thorlabs), 800-1650 nm sensitivity range, fiber input
  • Single Quantum Eos CS SNSPD system, Array of high efficiency, liquid Helium cooled, fiber-coupled superconducting nanowire single photon detectors, peak efficiency at 1550 nm, 10% efficiency at 780-2000 nm band, sub-40-ps timing jitter, 20 ns dead time
  • NewFocus 1414, 32 GHz InGaAs detector
  • Also various >1 GHz detectors available


Signal generators, BERT and pattern generators

  • 30GHz signal generator Rohde&Schwartz SMR30, Frequency range: 10MHz-30GHz
  • 12 GHz pulse pattern generator D3185 (Advantest)
  • 1 GS/s arbitrary waveform generator, AT-AWG 1104
  • Anritsu pulse pattern generator, 2.4 – 32 Gbit/s, (contact Markku Kapulainen)
  • Advantest Bit error rate tester, up to 12 Gbit/s (contact Markku Kapulainen)
  • Multilane ML4039, 4 channel bit error rate tester, up to 30 Gbps/ch (contact Antti Tanskanen)



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