Abstract

Analog pulse position modulation of pulsed emission from a laser, which is actively and harmonically mode-locked. The laser requires: a body of an active gain medium; means for changing the gain as a function of a controllable parameter; harmonically and actively mode-locking the laser by fast periodic changes of said parameter; and superimposing slower changes on the parameter whereby the fast periodic parameter changes can be continuously shifted between the peak and the shoulder of the gain-vs-parameter curve. As proof of concept, electric control of the separation between two interleaved pulse trains from a far-infrared (1.5-4 THz) p-Ge laser, which is actively mode-locked by rf gain modulation at the second harmonic of the roundtrip frequency, is demonstrated by changing the electric bias at the rf contacts. A suggested application is telemetry using analog pulse position modulation.

Document Type

Patent

Patent Number

US 6,580,733

Application Serial Number

09/448,627

Issue Date

7-17-2003

Current Assignee

UCFRF

Assignee at Issuance

UCFRF

College

College of Sciences

Department

Physics

Allowance Date

1-29-2003

Filing Date

11-24-1999

Assignee at Filing

UCFRF

Filing Type

Nonprovisional Application Record

Donated

no

Download Patent

Share

COinS