Application Submission Example

Name *

Kyle Lynch

Department & Title *

Graduate Researcher- Aerospace Engineering

Institution or Company *

Auburn University

Company Address *

Auburn University South College St, Auburn Alabama 36849

Phone Number *

(555) 555-5555

Email Address *

This email address is being protected from spambots. You need JavaScript enabled to view it.

WebsiteLink: We will use this in the published article *

http://www.auburn.edu

Company Information Section- 1 Paragraph

Auburn University has been offering engineering courses since 1872 and has a long and rich tradition of excellence in engineering education. Our undergraduate enrollment for fall 2010 is 3,890 and graduate 810. The college is Auburn's largest and highest ranked.

Application Abstract or Paragraph: 1-2 Paragraphs

The Auburn University Pulse Burst Laser system is a high-repetition-rate (> 1 MHz), high power (> 100 mJ/pulse) laser system designed for optical measurements of high speed fluid flow. The system consists of multiple components, including a low power seed laser and multiple laser amplifiers. Being able to independently trigger each of these devices is critical for system performance and configurability.

Setup Information: 1-2 Paragraphs

A Quantum Composers 9538 is used to trigger all elements of the system. The first channel of the unit is used to generate the initial low-power laser pulses for the amplifiers. This is a high-repetition-rate, 20 nanosecond train of pulses that repeats at approximately 2 Hertz. Thus, “burst” of pulses is generated at a relatively low repetition rate. This burst operation is critical to reduce thermal loading on the system, while still enabling high individual pulse energy. An example waveform is shown in Figure 1.

Additional Research Information

After the initial low-power (nanojoule/pulse) pulse train is created, it enters a chain of five flashlamp-pumped laser amplifiers. By adjusting the delay and pulsewidth of each flashlamp, the gain of the entire amplifier chain can be tuned as necessary in order to generate the maximum output power and ensure uniform amplification of each pulse in the burst. To do this, each amplifier is connected to separate outputs on the Quantum Composers unit and adjusted appropriately.
Another output of the Quantum Composers unit is used to trigger a high speed camera. In our work, we utilize a DRS Hadland Ultra68, capable of acquiring 68 images at framing rates up to 500,000 frames per second. Each frame is timed to correspond to a pulse in the burst. If configured for planar 2-D imaging, this enables “movies” of high speed flows to be obtained. For example, in Figure 2, six images are presented of a turbulent boundary layer at five times the speed of sound. By extending the system with a galvanometric scanning mirror, the burst of pulses can be swept through a volume. For subsonic flows, this enables a 3-D reconstruction to be created from the individual images. Figure 3 is a representative 3-D reconstruction of a round jet, with an exit velocity of 10 ft/s.

Reccomendation & Quote from Engineers

"Add quote or recommendation here"

System Diagram or System Photo 1

pivdiagram2012.gif 135.36 kB · gif

System Diagram or System Photo 2

brownsystem.jpg 1.24 MB · jpg

Application or Research Photo 1

plif_0079.jpg 131.06 kB · jpg

Application or Research Photo 2

vid2.jpg 56.61 kB · jpg

Optional Paper Upload

auburn_quantum_composers_applications.docx 1.17 MB · docx

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