Browse Prior Art Database

Pulse Generator

IP.com Disclosure Number: IPCOM000092317D
Original Publication Date: 1968-Nov-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Stuckert, PE: AUTHOR

Abstract

This pulse generator comprises coaxial transmission line 10 whose inner conductor 74 has a portion 24 of high resistivity Si, a mode locked laser 30 a light pulse of which renders conductive portion 24, and a counter for gating laser pulses. One end of line 10 is terminated with the characteristic impedance 20. The other end connects with voltage supply 22 via a high impedance 24 and is essentially open. Inner conductor 74 consists of Al layer 74 on sapphire isolator 70 and a thin section 24 of high resistivity Si. Through outer conductor 14 pass radial optical fibers 60 from Kerr cell 36. A light pulse from laser 32 traversing cell 36 and fibers 60 raises the conductivity of portion 24 and causes pulses in line 10.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Pulse Generator

This pulse generator comprises coaxial transmission line 10 whose inner conductor 74 has a portion 24 of high resistivity Si, a mode locked laser 30 a light pulse of which renders conductive portion 24, and a counter for gating laser pulses. One end of line 10 is terminated with the characteristic impedance 20. The other end connects with voltage supply 22 via a high impedance 24 and is essentially open. Inner conductor 74 consists of Al layer 74 on sapphire isolator 70 and a thin section 24 of high resistivity Si. Through outer conductor 14 pass radial optical fibers 60 from Kerr cell 36. A light pulse from laser 32 traversing cell 36 and fibers 60 raises the conductivity of portion 24 and causes pulses in line 10. The pulse arriving at characteristic impedance 20 has a rise time equal to the duration of the light pulse and lasts until the reflection from the open end arrives or till the time the hole electron pairs generated in the Si combine. The light pulses of duration 5ps and interval 6ns from mode locked laser 30 are gated through cell 36. This is controlled by thyratron pulser 46, via mirror 34, photo detector 38, counter 40, and trigger 42. Delay 44 resets counter 40 after a suitable time. This circuitry admits, e.g., one of every 8 pulses to the coaxial line.

1

Page 2 of 2

2

[This page contains 1 picture or other non-text object]