1 October 1995 High dynamic range applications of integrated optic modulators
Author Affiliations +
We review current 18 gigahertz optic link technology with a spurious free dynamic range of 110 dB/Hz2/3. The dynamic range of an externally modulated optic link increases with increasing optical power on the photodetector. One of the limiting factors for dynamic range is the amount of optical power that the photodiodes can handle. A method to allow greater optical information sideband power throught the link by filtering out some of the optical carrier will be discussed. The I/O modulator is normally run with an otpcial modulation depth of 4%. It should be possible to increase this by reducing the amount of optical carrier sent to the detector. This increase in the depth of modulation will reduce the RF loss and noise figure of the optic link thereby reducing the preamplifier requirements to obtain maximum dynamic range. This should make possible a spurious free dynamic range of 120 (db/Hz)2/3 with commercially available 18 GHz photodetectors. This technique could also be used to reduce problems caused by stimulated Brillouin scattering in long lengths of SM fiber.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Glen W. Drake, Glen W. Drake, Sears William Merritt, Sears William Merritt, } "High dynamic range applications of integrated optic modulators", Proc. SPIE 2560, Optical Technology for Microwave Applications VII, (1 October 1995); doi: 10.1117/12.218509; https://doi.org/10.1117/12.218509


Back to Top