How Do You Calculate the Number of Laser Pulses in a Run?

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Homework Help Overview

The discussion revolves around calculating the number of laser pulses in a run, with specific parameters provided such as wavelength, pulse duration, pulsed energy, and pulse rate. The original poster references a published paper that states approximately 1800 pulses per run and seeks a method to verify or calculate this number.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the relationship between pulse duration, pulse rate, and the total number of pulses. There are attempts to clarify the meaning of terms like "bullet length" in the context of laser physics. Questions are raised about verifying the data and the implications of the calculations presented.

Discussion Status

The discussion is ongoing, with some participants providing clarifications and confirming calculations. There is no explicit consensus on the methodology for verification, but some guidance on understanding the relationships between the parameters has been offered.

Contextual Notes

Participants note the challenge of verifying the data without direct communication with the original researchers. The calculations assume a straightforward relationship between the number of pulses and the pulse rate, which is under discussion.

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Homework Statement



wavelength 1.08um
pulse duration 20ns
pulsed energy 700mJ
pulse rate 15Hz

=> Total number of pulses ~1800 per run
Came across in a paper published. Was thinking a way to calculate the numbers of pulses ?

Homework Equations



laser beam comes in pulses with pulse duration as the bullet length while pulse rate as the firing rate of the gun. While pulsed energy tells amount of gun powder per bullet.


The Attempt at a Solution


tried google until i read about the above explanation from this forum. Any book to recommend ?
 
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You pretty much nailed it. It's not that esoteric to laser physics, anyway. One slight clarification: "bullet length" = pulse duration times speed of light. Usually, in (table top) laser experiments, it is convenient to distinguish time and space (whereas in, e.g., special relativity, it is convenient to treat them as the same thing).

Sorry, I don't know of a book off the top of my head.
 
artwork said:
=> Total number of pulses ~1800 per run
Came across in a paper published. Was thinking a way to calculate the numbers of pulses ?

Welcome to PF. What is it you want to know? They tell you, each run uses 1800 pulses.
 
Is there anyway to verify those data ?

Does it meant that the time for each run is, t = num pulse/pulse rate = 1800/15 = 120s
 
artwork said:
wavelength 1.08um
pulse duration 20ns
pulsed energy 700mJ
pulse rate 15Hz

artwork said:
Is there anyway to verify those data ?
Not really, unless you call up or email the people who made those measurements and ask them.

Does it meant that the time for each run is, t = num pulse/pulse rate = 1800/15 = 120s

Yes, exactly.
 

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