Lidar Working Group Meeting

1
HARLIE GLOW Union UV Doppler Demonstration

• Geary Schwemmer
• Bruce Gentry
• NASA GSFC

2
Outline

• Objectives
• Components Interfaces
• UV HOE
• Laser Transmitter Optics
• Schedule

3
Objectives

• Test UV HOE in lidar operation
• Verify laser beam steering and boresight
  alignment
• Demonstrate HOE in Doppler measurements

4
Components Interfaces
GLOW Doppler UV Receiver
Lidar signal

• HARLIE tele-scanner assembly

Lidar data
Scanner control data
Mechanical
Beam
GLOW Data System
Fibertek Laser
Sync
5
UV HOE

• 1-m focal length
• 45 diffraction angle
• 40 cm diam. x 1 cm
• Central hole for laser transmission
• 62 efficiency (w/o AR coatings)
• Blur circle
• 243 µrad _at_86
• 200 µrad _at_73

6
Laser Transmitter Optics
7
Laser Optical Interface
M4
7x Beam Exp
M3
M2
QWP
M1
Hign Brightness Laser 355 nm 50 mJ 50 Hz
Motorized for boresight control
8
Schedule

• Designs completed 20 May 2004
• Fabrication complete 23 July 2004
• Assembly alignment complete 27 August 2004
• First light 3 September 2004
• Doppler measurements 30 September 2004