Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Synchronous amplitude and time control for an optimum dynamic range variable photonic delay line

Not Accessible

Your library or personal account may give you access

Abstract

A synchronous-amplitude-controlled and time-delay-controlled photonic controller for phased-array antenna applications is proposed and demonstrated. Amplitude control is based on a variable optical attenuator system that operates in synchronism with the photonic delay line (PDL). This amplitude control system can provide both the signal calibration for the different PDL channels and settings required for driving the antenna elements of a phased-array radar and the optimum optical power levels that impinge on the photodetector for optimum fiber-optic-link performance. Various variable amplitude control modules based on ferroelectric liquid crystals, polymer-dispersed liquid crystals, and photoconductive devices are proposed. We show that the dynamic range loss due to a switched-PDL inherent structure loss can be compensated when we control the optical power from the laser, using the synchronous optical attenuation system. For the first time to our knowledge, full dynamic range loss compensation is demonstrated for an external-modulation-fed 3-bit switched PDL with a structure optical insertion loss of 5.5 dB. A compression dynamic range of 158 dB·Hz was measured at 6 GHz, and a spurious free dynamic range of 111 dB·Hz2/3 was estimated. Feasibility of the dynamic range compensation technique for multichannel, higher-insertion-loss PDL systems is discussed.

© 1999 Optical Society of America

Full Article  |  PDF Article
More Like This
Demonstration of an all-digital 7-bit 33-channel photonic delay line for phased-array radars

Nicholas Madamopoulos and Nabeel A. Riza
Appl. Opt. 39(23) 4168-4181 (2000)

Directly modulated semiconductor-laser-fed photonic delay line with ferroelectric liquid crystals

Nicholas Madamopoulos and Nabeel A. Riza
Appl. Opt. 37(8) 1407-1416 (1998)

Linearized fiber-optic link with a high spurious free dynamic range over a wide frequency range

Ruiqi Zheng, Erwin H. W. Chan, Xudong Wang, Xinhuan Feng, and Bai-ou Guan
Appl. Opt. 58(11) 2832-2838 (2019)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (10)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (4)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved