CS-LDTC06 WAVELENGTH | Alldatasheet

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fast repetition rate solution to ozone concentration measurement. increase, and it would be difficult for plants to live and grow. from the sun is blocked by the ozone layer. altitude ozone for health concerns and pollution limitations. Figure 1. Ozone Altitude Comparison1 range, or limited measurement windows.

to ensure the correct wavelength is emitted. Figure 4. Bridger Photonics' ozone measuring DIAL The solid state laser is pumped by laser diode arrays. (repetition rate) with 9 mJ (energy) for 6 ns (pulse width). 200 µJ at a repetition rate of 1 kHz. background in setting it up. signal—making measurement and data collection easier. the current research-grade systems. to the versatility of the design. with a slightly modified version of this system.

Case Study CS-LDTC06 Rev. A Page 4 © 2020 • Sales & Technical Support: (406) 587-4910 • email: sales@teamWavelength.com • web: www.teamWavelength.com KEYWORDS Differential Absorption Lidar, DIAL, ozone, atmosphere, remote sensing, pump laser, pulse, dual wavelength, controller, troposphere PRODUCTS USED PTC10K-CH LD15CHA

REVISION HISTORY

Document Number: CS-LDTC06 REVISION DATE NOTES A July 2020 Initial Release REFERENCES 1. Geography, "What Is Ozone and Why Is It So Important," https://ozonewatch.gsfc.nasa.gov/facts/SH.html 2. "Tropospheric Ozone LIDAR Network," National Aeronautics and Space Administration, https://www-air.larc.nasa.gov/missions/TOLNet/index.html 3. Minh, Pham & Bui, Hai & Tien, Tho & Dinh Van, Trung. (2017). "Development of Uv Laser Source Based on Distributed Feedback Dye Lasers For use in Measurement of Ozone in the Lower Atmosphere." Communications in Physics. 27. 345. 4. Bridger Photonics https://www.bridgerphotonics.com USEFUL LINKS

  • LD15CHA Product Page
  • PTC10K-CH Product Page WAVELENGTH'S ROLE The PTC10K-CH provides stable thermoelectric current to control the temperature of the laser diode arrays and the nonlinear crystal. This controller delivered the precision performance and long-term reliability Bridger Photonics required. The PTC has stability as low as 0.0012ºC, up to

10 A, and offers comprehensive safety including current

limits. The proportional-integration control minimizes setpoint overshoot and time to the set temperature. The LD15CHA delivers up to 15 A of output current to the laser diode arrays which pump the solid state laser. Because Bridger Photonics operates the driver near limit, it is important that the output current never exceed the setpoint. The LD15CHA can be configured (setpoint and limit) without output current enabled. Both the temperature controllers and laser drivers easily connect to the laser diode pump system. Figure 5 shows the three PTC10Ks and the two LD15CHAs in the system without the optical components. The controllers can be daisy-chained for clear communication. A single wire from the microprocessor enables the LD15CHA drivers. The controllers and drivers provided the stability and precision needed for DIAL mapping of ozone concentration. Figure 5. LD15CHAs and PTC10Ks mounted in the