Unlock instant, AI-driven research and patent intelligence for your innovation.

Carrier-Envelope Phase Shift Using Linear Media

Inactive Publication Date: 2010-10-07
MASSACHUSETTS INST OF TECH
View PDF13 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, very often, technical constraints of detection and / or control electronics make a free choice of fCEO very attractive.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Carrier-Envelope Phase Shift Using Linear Media
  • Carrier-Envelope Phase Shift Using Linear Media
  • Carrier-Envelope Phase Shift Using Linear Media

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

A) The Carrier-Envelope Offset Frequency

[0020]The real electric field, E(z,t), of a laser pulse may be decomposed into

E(z,t)=Re{A(z,t)ei(ω0t+k(ω0)zetφ(t)eIφCEO}  (1)

with A(z,t) representing the real envelope and the following exponential describing the oscillation with the carrier frequency, ω0, where the time-dependent phase term, φ(t), describes the chirp of the pulse and φCEO describes the phase between the maximum 16 of the carrier-wave 12 and the maximum 18 of the envelope 14 (as shown in FIG. 1)—the so-called carrier-envelope phase. During propagation of the wave-packet, the carrier-wave propagates with the phase velocity, νp, and the envelope 14 propagates with the group velocity, νg. Since all media, and even air, exhibit a wavelength-dependent index of refraction, phase and group velocity through a medium are generally different. As a consequence, φCEO changes continuously over time. The carrier-envelope phase shift, Δφ, caused by passing through a dispersive medium of leng...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The carrier-envelope phase in a train of optical pulses is varied utilizing the dispersive properties of lossless plates while the total dispersion in transmission is maintained practically constant. The plates include sloped surfaces and are mounted for displacement such that the ratio of the thicknesses of the two plates through which the optical pulses will pass can be varied by displacing the plates so as to shift the carrier-envelope phase in the optical pulses. In one embodiment, the plates include a barium fluoride wedge and a fumed silica wedge, wherein the wedges are bond together to form a composite structure with thicker and thinner portions of the wedges inversely matched.

Description

RELATED APPLICATION[0001]This application claims the benefit of U.S. Provisional Application No. 60 / 748,858 filed Dec. 9, 2005 and is a Divisional of U.S. Ser. No. 11 / 608,666, filed 8 Dec. 2006.GOVERNMENT SUPPORT[0002]The invention was supported, in whole or in part, by a grant, N00014-02-1-0717, from the Office of Naval Research. The Government has certain rights in the invention.BACKGROUND[0003]Optical pulses have an electric field associated therewith. As shown in FIG. 1, the electrical field can be described as a high-frequency oscillation, known as the “carrier” (or “carrier-wave”) 12. The carrier 12 is contained within a lower-frequency “envelope”14. As shown, the carrier peak magnitude 16 and the envelope peak magnitude 18 are not always aligned, and the difference in relative position between the carrier and the envelope is known as the offset phase. The offset phase can shift as the optical pulses pass through a medium in which the carrier and envelope propagate at differen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): G01B9/02G02B5/04
CPCG01J11/00G02B5/04G02B26/06G02F1/0102G02F2203/26H01S3/1022G02F2203/54H01S3/0014H01S3/0057H01S3/10053G02F2203/50
Inventor KAERTNER, FRANZ X.ELL, RICHARD
Owner MASSACHUSETTS INST OF TECH