d2:d2_250_heterodyne_module
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d2:d2_250_heterodyne_module [2016/05/12 21:40] – [Alignment Procedure] echandler | d2:d2_250_heterodyne_module [2021/08/26 15:26] (current) – external edit 127.0.0.1 | ||
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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 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. | ||
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=====Purchase Includes===== | =====Purchase Includes===== | ||
* D2-250 Heterodyne Module | * D2-250 Heterodyne Module | ||
+ | * VPN00460 Fiber Optic Cable (multimode) | ||
+ | * F220FC-B Fiber Coupler | ||
+ | * 5/64" Hex Key | ||
===== Absolute Maximum Ratings ===== | ===== Absolute Maximum Ratings ===== | ||
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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. | 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. | ||
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=====Alignment Procedure===== | =====Alignment Procedure===== | ||
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===Procedure=== | ===Procedure=== | ||
Mount both laser modules and the D2-250 Heterodyne Module to an optical breadboard or table. Leave sufficient space between the lasers and optical modules to allow for the adjustment of the hex screws and insertion of the F220FC-B Fiber Coupler and VPN00460 Fiber Optic Cable. Turn on both lasers. During mounting, align the first laser such that the beam enters " | Mount both laser modules and the D2-250 Heterodyne Module to an optical breadboard or table. Leave sufficient space between the lasers and optical modules to allow for the adjustment of the hex screws and insertion of the F220FC-B Fiber Coupler and VPN00460 Fiber Optic Cable. Turn on both lasers. During mounting, align the first laser such that the beam enters " | ||
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Turn OFF both lasers, then screw the F220FC-B Fiber Coupler into the "FC Port" on the D2-250 and hand tighten. Screw in the FC/APC connector of the VPN00460 Fiber Optic Cable into the F220FC-B Fiber Coupler and hand tighten. | Turn OFF both lasers, then screw the F220FC-B Fiber Coupler into the "FC Port" on the D2-250 and hand tighten. Screw in the FC/APC connector of the VPN00460 Fiber Optic Cable into the F220FC-B Fiber Coupler and hand tighten. | ||
- | With the power meter, observe the output power through the VPN00460 Fiber Optic Cable. With the 5/64" hex key, adjust the first kinematic mount in the " | + | With the power meter, observe the output power through the VPN00460 Fiber Optic Cable. With the 5/64" hex key, adjust the first kinematic mount in the " |
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Fully optimize the coupling into the fiber by adjusting the " | Fully optimize the coupling into the fiber by adjusting the " | ||
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Block laser #1, and rotate the " | Block laser #1, and rotate the " | ||
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d2/d2_250_heterodyne_module.txt · Last modified: 2021/08/26 15:26 by 127.0.0.1