Accession Number : ADA640902


Title :   Reduction of Photodiode Nonlinearities by Adaptive Biasing


Descriptive Note : Memorandum rept. 21 Oct 2015-15 Jun 2016


Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC PHOTONICS TECHNOLOGY BRANCH


Personal Author(s) : Hutchinson, Meredith N ; Nicholas J Frigo, ; Williams, Caitlin R


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a640902.pdf


Report Date : 14 Oct 2016


Pagination or Media Count : 21


Abstract : RF photonic links impress information on modulated optical carriers as a method of transporting high frequency and microwave information over sizeable distances. If the system bandwidth is greater than one octave, the system must contend with the possibility of second order intermodulation distortion (IMD2) creating spurious tones due to nonlinearities. These spurious tones masquerade as signals and impair the performance of the photonic link. Earlier research has shown the utility of defining a nonlinear coefficient that relates the nonlinear second order distortion from two optical tones to the product of the powers of those tones. This nonlinear coefficient was shown to be a function of (i) the bias voltage applied to the photodiode/load resistor combination (Vtot), (ii) the DC level of current through the photodiode, IDC, and (iii) the IMD output frequency


Descriptors :   *FIBER OPTICS , DISTORTION , PHOTODIODES , SCHEMATIC DIAGRAMS


Subject Categories : Electrooptical and Optoelectronic Devices
      Fiber Optics and Integrated Optics


Distribution Statement : APPROVED FOR PUBLIC RELEASE