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--- d2:d2_250_heterodyne_module [2016/05/12 21:52] – [Alignment Procedure] echandler
+++ d2:d2_250_heterodyne_module [2016/05/12 21:58] – echandler
@@ Line 17: / Line 17: @@
 The D2-250 heterodyne module is designed to provide a fiber-coupled heterodyne optical beat note formed by picking-off a small proportion of light from each of two laser beams. Light is coupled into a multi-mode fiber. A second output port can be used to align the overlap the two picked-off beams.  The light entering the module should be linearly polarized in either vertical or horizontal direction for best results.
+<imgcaption 250-system|D2-250 in phase lock system>{{ :d2:d2_250:d2-250_schematic.png?400 }}</imgcaption>
 =====Purchase Includes=====
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 The D2-250 Heterodyne Module utilizes the same three pickoff-cube architecture as the D2-150. With this revision, each input beam passes through a rotatable zero-order half-waveplate prior to a polarizing beam splitter, enabling the user to adjust the amount of power from each source beam diverted to the optically mixed outputs. A 50:50 non-polarizing beam splitter overlaps the pickoff light into a fiber coupler. Each cube rests on a 2-axis kinematic mount adjustable from the module exterior, enabling horizontal and vertical beam pointing adjustment.
+<imgcaption 250-label|D2-250 Key Components>{{ :d2:d2_250:d2-250_labeled_schematic.png?400 }}</imgcaption>
 =====Alignment Procedure=====
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 <imgcaption 250-top|D2-250 Heterodyne Module>{{ :d2:d2_250:d2-215-top-down.png?300 }}</imgcaption>
-<imgcaption 250-label|D2-250 Key Components>{{ :d2:d2_250:d2-250_labeled_schematic.png?400 }}</imgcaption>
-<imgcaption 250-system|D2-250 in phase lock system>{{ :d2:d2_250:d2-250_schematic.png?400 }}</imgcaption>