| US 7,493,051 B2 | ||
| Generating of high rate modulated pulse streams | ||
| Arie Shahar, Rye Brook, N.Y. (US); and Eldan Halberthal, Rye Brook, N.Y. (US) | ||
| Assigned to Main Street Ventures LLC, White Plains, N.Y. (US) | ||
| Filed on Jan. 22, 2008, as Appl. No. 12/17,367. | ||
| Application 12/017367 is a division of application No. 10/845238, filed on May 14, 2004, granted, now 7,362,976. | ||
| Application 10/845238 is a continuation in part of application No. 10/640035, filed on Aug. 14, 2003, granted, now 7,212,705. | ||
| Application 10/640035 is a continuation in part of application No. 10/640018, filed on Aug. 14, 2003, granted, now 7,130,539. | ||
| Application 10/640018 is a continuation in part of application No. 10/640017, filed on Aug. 14, 2003, granted, now 7,218,862. | ||
| Application 10/640017 is a continuation in part of application No. 10/640040, filed on Aug. 14, 2003, granted, now 6,956,998. | ||
| Application 10/640040 is a continuation in part of application No. 10/404140, filed on Apr. 02, 2003, granted, now 6,795,626. | ||
| Application 10/404140 is a continuation in part of application No. 10/404077, filed on Apr. 02, 2003, granted, now 6,892,016. | ||
| Application 10/404077 is a continuation in part of application No. 10/472244, granted, now 7,215,844, previously published as PCT/US02/09969, filed on Mar. 28, 2002. | ||
| Application 10/845238 is a continuation in part of application No. 10/862363, filed on Apr. 19, 2004, granted, now 7,136,557. | ||
| Application 10/862363 is a continuation in part of application No. 10/827314, filed on Apr. 20, 2004, granted, now 7,203,396. | ||
| Application 10/827314 is a continuation in part of application No. 10/834343, filed on Apr. 29, 2004. | ||
| Claims priority of provisional application 60/472776, filed on May 23, 2003. | ||
| Claims priority of provisional application 60/405697, filed on Aug. 22, 2002. | ||
| Claims priority of provisional application 60/464351, filed on Apr. 22, 2003. | ||
| Claims priority of provisional application 60/465237, filed on Apr. 25, 2003. | ||
| Prior Publication US 2008/0118248 A1, May 22, 2008 | ||
| Int. Cl. H04B 10/02 (2006.01) | ||
| U.S. Cl. 398—179 [398/146; 398/175] | 7 Claims |
| 1. An optical rate increasing device comprising:
a coupling device comprising a first input, a first output, a second input, and a second output,
wherein the first input and the first output are an upper pair of branches of the coupling device that are crossbar connected
via the coupling device,
wherein the second input and the second output are a lower pair of branches of the coupling device that are crossbar connected
via the coupling device; and
an optical loop including a threshold device, an optical amplifier, a delay line, and a gate,
wherein the optical loop is associated with the second input and the second output to produce a closed optical loop,
wherein said closed optical loop is coupled, by the coupling device, to the first input and to the first output and is arranged
to receive a first periodic signal from said first input and to produce therefrom a second periodic signal at said first output,
wherein the rate of said second periodic signal is higher than the rate of said first periodic signal,
wherein a product between a combined effect of gain of said optical amplifier and an overall attenuation loss on a pulse propagating
in a round trip along said closed optical loop is substantially equal to one, thereby producing said second periodic signal
having pulses that are substantially identical,
wherein said threshold device is arranged to block spontaneous radiation emitted by said optical amplifier, thereby to prevent
evolvement of said spontaneous radiation into a lasing mode under a condition represented by the value of said product,
wherein said optical amplifier is arranged to operate in a saturated mode to increase stability of said optical amplifier,
thereby to ensure that said pulses of said second periodic signal are substantially identical,
wherein said gate is arranged to change its state from a transmitting state to a blocking state between every two consecutive
pulses of said first periodic signal, and
wherein said delay line is adjusted to produce said second periodic signal having equally spaced pulses.
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