US 12,136,949 B1
Enhanced subranging electro-optic modulator (SEOM) for high dynamic range applications
Bahram Jalali, Los Angeles, CA (US); and William R Ryan, Los Angeles, CA (US)
Assigned to Serford Holdings, LLC, El Segundo, CA (US)
Filed by Seaford Holdings, LLC, El Segundo, CA (US)
Filed on May 31, 2024, as Appl. No. 18/680,843.
Application 18/680,843 is a continuation in part of application No. 18/585,565, filed on Feb. 23, 2024.
Application 18/585,565 is a continuation of application No. 18/238,801, filed on Aug. 28, 2023, granted, now 11,916,595, issued on Feb. 27, 2024.
This patent is subject to a terminal disclaimer.
Int. Cl. H04J 14/02 (2006.01); H04B 10/2543 (2013.01); H04B 10/2575 (2013.01); H04B 10/50 (2013.01); H04B 10/58 (2013.01)
CPC H04B 10/2543 (2013.01) [H04J 14/0307 (2023.08); H04B 10/2575 (2013.01); H04B 10/505 (2013.01); H04B 10/5053 (2013.01); H04B 10/50575 (2013.01); H04B 10/50595 (2013.01); H04B 10/58 (2013.01); H04B 2210/075 (2013.01); H04J 14/02 (2013.01); H04J 14/0279 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method of electrooptic modulation, employing a distributed subranging architecture and comprising:
transmitting a plurality of laser beams;
delivering the plurality of laser beams to a corresponding plurality of electro-optic modulators;
applying a plurality of voltage bias signals to each of the corresponding plurality of electro-optic modulators;
applying a data signal to be modulated at each of the corresponding plurality of electro-optic modulators in parallel;
generating a plurality of modulated optical signals at the corresponding plurality of electro-optic modulators based at least in part on the plurality of voltage bias signals, wherein an input range of the data signal is captured by a linear portion of a transfer function of the corresponding plurality of electro-optic modulators and a linear portion of a range of the plurality of modulated optical signals is increased due to a number of the corresponding plurality of electro-optic modulators;
sending or transmitting the plurality of modulated optical signals to unique optical fibres or in unique free space optical communication channels to a receiving device;
detecting a plurality of received modulated optical signals at an associated plurality of photodetectors;
converting the detected plurality of received modulated optical signals into a plurality of received digital modulated optical signals using an analog-to-digital converter;
performing a threshold operation on the plurality of received digital modulated optical signals to identify the range between a minimum and a maximum wherein the range corresponds to the linear portion of the transfer function; and
splicing or fusing the plurality of received digital modulated optical signals into a final received optical signal, wherein the final received optical signal spans the linear portion of each electro-optic modulator.