The Laser Heterodyne System is a complete, easy-to-use system for calibrating and characterizing laser frequency standards. The system characterizes both short- and long-term behaviors of primary (e. g. iodine-stabilized) and secondary (e. g. 2-mode polarization-stabilized or Zeeman-stabilized) laser frequency standards using the highly accurate and sensitive optical heterodyne technique. A basic heterodyne system accommodates a reference laser and one laser-under-test, but can be easily expanded to accommodate multiple lasers or re-configured to meet the needs of special applications.

Basic System Components:

	0.6 m x 0.9 m optical breadboard
	(2) broadband HR mirrors and (1) broadband beam combiner with kinematic mirror mounts
	Focusing lens with 3-axis translation stage
	Linear polarizer, lambda/4 and lambda/2 waveplates with rotary mounts, and adjustable aperture
	Acousto-optic modulator for optical isolation
	1 GHz photodetector with lo-noise high-gain amplifier, power supplies, lo-pass filters, and rf power splitter
	Agilent 53181A frequency counter with IEEE-488 interface and 1.5 GHz option
	Notebook computer with IEEE-488 interface and Windows XP operating system
	LaserCal data acquisition and analysis software

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Application Notes:
         App. Note 1: Principles of Laser Heterodyne Measurements (326 kB)
         App. Note 2: Using the Winters Electro Optics Heterodyne System (276 kB)
         App. Note 3: Testing Various Laser Frequency Standards (68 kB)