Industrial applications of repetitively pulsed lasers: analysis of precision problems

Nasrullah Khan; Tom A. Hall

doi:10.1117/12.377064

7 February 2000 Industrial applications of repetitively pulsed lasers: analysis of precision problems

Nasrullah Khan, Tom A. Hall

Proceedings Volume 3888, High-Power Lasers in Manufacturing; (2000) https://doi.org/10.1117/12.377064
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

Abstract

Industrial applications of highly repetitive laser may cause precise exposure problems. This paper reports findings of an experimental study on integral gain accretion during repetitive excitation of distributed feedback dye lasers. To estimate the effect 10 to 20 pulses of second harmonic of a passively Q-Switched and mode-locked Nd:YAG laser were used to excite a distributed feedback dye laser (DFDL). The signals of DFDL and Nd:YAG laser were recorded by Imacon 675-streak camera with no relative delay. It was found that the peak of DFDL output envelope of pulses was delayed from peak of the excitation Nd:YAG envelope of pulses by more than one inter- pulse period (2L/C) of excitation laser. Various types of cases such as different excitation energies and inter-pulse time periods were studied and an intensity-based model was developed. Time delay between the peaks of pulse envelopes of Nd:YAG and DFDL was found to depend upon the inter-pulse period (2L/C) of the excitation laser. A computer program was used to simulate the experimentally measured delay to estimate thermal decay constants and energy retained by the medium. It was found that for smaller inter-pulse periods the effect of gradual gain build-up becomes very significant to affect some of the sensitive applications in welding and communication. This effect was used to measure thermal diffusion time constant of dye solutions.

Citation Download Citation

Nasrullah Khan and Tom A. Hall "Industrial applications of repetitively pulsed lasers: analysis of precision problems", Proc. SPIE 3888, High-Power Lasers in Manufacturing, (7 February 2000); https://doi.org/10.1117/12.377064

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Nd:YAG lasers

Pulsed laser operation

Computer simulations

Dye lasers

Laser applications

Streak cameras

Mode locking

Show All Keywords

Keywords/Phrases

Search In:

Publication Years