IQRX™ – High Performance Coherent Optical Receiver

IQRX™ is the gold-standard coherent receiver for the measurement of coherent modulation formats such as QPSK, 64QAM and ODFM.

  • Dual polarization
  • Supports DP-QPSK, DP-16QAM and a variety of other PSK and QAM formats and custom formats
  • Narrow linewidth internal laser
  • Single ended RF outputs


fast attenuation

High-performance, low-noise coherent receiver

IQRX is designed and built using the highest-performing discrete fiber optic components to provide superior fidelity measurement of coherently modulated signals. To minimize noise, IQRX does not use a transimpedance amplifier (TIA), a component often found in commercially available ICRs.

power monitoring

Dual polarization measurement

IQRX houses polarization selective hardware to characterize polarization multiplexed signals. LO input, signal output and internal laser outputs all use polarization maintaining (PM) fiber for the highest versatility.

smarter calibration

Four single-ended outputs

Designed to be used with any real-time oscilloscopes with sufficient bandwidth and sampling rate, the single-ended outputs make it convenient to pair with the four input channels of most oscilloscopes. In high-bandwidth oscilloscope configurations where there are only two channels per unit, IQRX’s slim profile and wide footprint enable it to be placed between multiple oscilloscope units.

low insertion lossBuilt-in narrow linewidth tunable laser

IQRX comes with a built-in narrow 25 KHz instantaneous linewidth laser, making it perfect for coherent modulation formats that require high phase stability.

narrow linewidth

19 inch rack mountable

IQRX can be paired with the rack mount brackets for easy mounting in any 19 inch rack.

1 year warranty_60x60Product warranty

This product comes with a standard 1 year warranty. Optional 3 or 5 year extended warranties are also available.


  • Coherent DSP development
  • Coherent transmitter testing
  • Custom modulation format development
  • Mil / Aero communications R&D

OMA System Schematic

optical spectrum analyzer wavelengths coherent solutions

Download Spec Sheet

For more information, please download the IQRX Spec Sheet which includes full technical specifications.

 IQRX Spec Sheet


If you would like to find out more about this product, please contact us.

Please note: Coherent Solutions is now known as Quantifi Photonics. The new Quantifi Photonics website launches soon at

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