All-Optical Noninvasive Delayed Feedback Control of by Sylvia Schikora

, , Comments Off on All-Optical Noninvasive Delayed Feedback Control of by Sylvia Schikora

By Sylvia Schikora

​The stabilization of risky states hidden within the dynamics of a procedure, particularly the regulate of chaos, acquired a lot cognizance within the final years. during this paintings, a well known keep an eye on process known as behind schedule suggestions keep watch over is utilized for the 1st time completely within the all-optical area. A multisection semiconductor laser gets optical suggestions from an exterior Fabry-Perot interferometer. The regulate sign is a phase-tunable superposition of the laser sign, and provokes the laser to function in an another way risky periodic kingdom with a interval equivalent to the time hold up. The regulate is noninvasive, as the mirrored sign has a tendency to 0 whilst the objective country is reached.

Show description

Read Online or Download All-Optical Noninvasive Delayed Feedback Control of Semiconductor Lasers PDF

Similar light books

Femtosecond Laser Pulses: Principles and Experiments

From the first editon: This tender advent for complex undergraduate scholars starts off with the basics of lasers and pulsed optics. hence ready, the scholar learns how you can generate brief and ultrashort laser pulses, easy methods to control them, and the way to degree them. eventually, spectroscopic implications are mentioned.

On the Hermeneutics of the Light Verse of the Quran (Tafsir Ayat al-Nur)

This paintings marks the assembly element of 4 various traditions of the Quranic statement: philosophical, Sufi, Shi'ite and theological. It additionally offers Mulla Sadra al-Shirazi's metaphysical remark and files the sooner commentaries at the mild Verse. it's major from the viewpoint of either the background of Quranic remark and Islamic Philosophy.

New Frontiers in Light Metals: Proceedings of the 11th International Aluminium Conference INALCO 2010

The complaints of the 2010 INALCO convention New Frontiers in gentle Metals is the 11th in a sequence of INALCO meetings, held each 3 years in view that 1979. For the 1st time, the scope of the convention has been prolonged to incorporate magnesium know-how. The shows emphasize the numerous demanding situations dealing with the sunshine metals at the present time in addition to the leading edge and artistic strategies built by means of and examine institutes as they attempt to stay aggressive in an more and more worldwide gentle metals marketplace.

Light Metal Systems. Part 1: Selected Systems from Ag-Al-Cu to Al-Cu-Er

The current quantity within the New sequence of Landolt-Börnstein offers significantly evaluated facts on part diagrams, crystallographic and thermodynamic facts of ternary alloy structures. trustworthy section diagrams supply fabrics scientists and engineers with uncomplicated info very important for primary learn, improvement and optimization of fabrics.

Additional info for All-Optical Noninvasive Delayed Feedback Control of Semiconductor Lasers

Example text

The FP interferometer is realized as a solid etalon. This choice requires an indirect adjustment of the optical emission to the fixed FP, but ensures sufficient stability and a conveniently short travelling time τl between laser and FP. This so-called latency time can be reduced to τl = 40 ps, which is of the order of the delay time τ. This is particularly important, as a too large latency would decrease the ability for control. Further, much effort is made to ensure control and stabilization of the latency gap on a subwavelength scale.

However, the stability of the solitary laser mode changes drastically in dependence on the feedback phase ϕ. On tuning ϕ, the small signal dynamics of the laser can be strongly influenced. When subject to a small disturbance, a cw emitting laser without external feedback shows damped relaxation oscillations (RO) back to the stationary state1 . The effects of additional FP feedback range from weak damping of the RO to overdamping, and also undamping, resulting in a destabilization in a Hopf bifurcation.

With solid etalons, the minimal interspace between laser and cavity is only limited by the necessary optics in the latency path. Another advantage of solid etalons is that they offer a stable FP roundtrip, so that no further attempts for stabilization of the FP phase φ are required. The drawbacks of FP glass etalons are a finite absorption inside the cavity, a fixed roundtrip time τ and fixed FP resonance frequencies - the optical frequencies which are transmitted by the interferometer. To overcome these limitations, the FP etalons feature negligible absorption, and come in sets of several etalons with different τ.

Download PDF sample

Rated 4.50 of 5 – based on 22 votes