Differences

This shows you the differences between two versions of the page.

--- d2:dbr_laser [2019/09/24 21:22] – [Aligning the DBR Laser Module] Michael Radunsky
+++ d2:dbr_laser [2024/03/29 22:18] (current) – [Absolute Maximum Ratings] Thomas Bersano
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 =====Description=====
+<WRAP center round box 60%>
+| {{ :warning-sign.png?200&nolink }}    | The D2-100 laser module is factory aligned.  It is not advised that the user attempts to re-align the laser in the field.  If the laser becomes misaligned, please return the unit to the factory for realignment.  |
+</WRAP>
 The DBR laser module is comprised of a distributed feedback (DBR) laser diode in a precision temperature-controlled housing with beam conditioning optics and an optical isolator.  DBR laser diodes are fabricated with the feedback grating patterned directly over the gain section of the diode.  They are highly immune to vibrations and by virtue of a very short cavity (~ 1 mm), they can be current tuned over more than 50 GHz.  The result is a robust laser capable of very fast servo control for easy locking to atomic transitions.  The module contains no moving parts or piezo-electrics and is therefore inherently robust and rugged.
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 <imgcaption DBR_Exploded|Exploded view of the DBR subassembly>
 {{ :d2:d2-100:dbr-inside-exploded-view.png?nolink&300 |}}</imgcaption>
+We use [[https://www.photodigm.com|Photodigm]] Spectroscopy-Certifed<sup>TM</sup> DBR lasers. \\
+[[https://www.photodigm.com|{{:d2:d2-100:photodigm_logo.png?direct&200|}}]]
 =====Purchase Includes=====
@@ Line 40: / Line 48: @@
 ===== Absolute Maximum Ratings =====
-Note: All modules designed to be operated in laboratory environment
+Note: All modules designed to be operated in a laboratory environment.
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 ^ Parameter ^ Rating ^
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 ^    ^  Min.  ^  Typical  ^  Max.  ^  Units  ^
-^Wavelength|  767, 770, 780, 795,\\ 852, 895, 1064, or 1083((Contact factory for other wavelengths))  |  nm  |||
+^Wavelength|  767, 770, 780, 795,\\ 852, 895, 1064, or 1083((Contact factory for other wavelengths))  |||  nm  |
 ^Output power|  30  |  40  |  50  |  mW  |
+^-HP1 Output power|  100  |  Wavelength Dependent  |  200  |  mW  |
 ^Beam diameter|  0.8  |  1.1  |  1.7  |  mm\\ (1/e<sup>2</sup> dia.)  |
 ^Polarization|  Horizontal  |||    |
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 ^Temperature range \\ Stage 1, housing \\ Stage 2, laser|  \\ 15 \\ 0  |  \\ 20\\ 15  |  \\ 40\\ 50 <sup>(</sup>((Operation above 40° C can reduce the lifetime of the laser diode))  |  \\ °C  |
 ^Temperature stability|  See [[d2:laser_controller|Laser Controller]]  |    |
-^[[http://www.analogtechnologies.com/ath10kr8.html|Analog Technologies ATH10KR8 Thermistor]]||<html> &nbsp;&nbsp; </html>| 10k | Ω |
+^[[http://www.analogtechnologies.com/ath10kr8.html|Analog Technologies ATH10KR8 Thermistor]]| | | 10k | Ω |
-^Analog Technologies ATH10KR8 Beta||<html> &nbsp;&nbsp; </html>| 3480 | K |
+^Analog Technologies ATH10KR8 Beta| | | 3480 | K |
-^Analog Technologies ATH10KR8 T<sub>0</sub>((Temperature at which thermistor reads 10 kΩ))||<html> &nbsp;&nbsp; </html>| 25 | °C |
+^Analog Technologies ATH10KR8 T<sub>0</sub>((Temperature at which thermistor reads 10 kΩ))| | | 25 | °C |
 ^Safety Class|  3B  |    |
-^Beam height|  0.95  |  inches  |||
+^Beam height|  0.95  |||  inches  |
-^Total package Size \\ (L x W x H)|  3.75 x 4 x 2  |  inches  |
+^Total package Size \\ (L x W x H)|  3.75 x 4 x 2  |||  inches  |
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-=====Inputs, Outputs, and Controls=====
+=====Laser Control Signals=====
-<WRAP center round box 60%>
-| {{ :warning-sign.png?200&nolink }}    | The D2-100 laser module is factory aligned.  It is not advised that the user attempts to re-align the laser in the field.  If the laser becomes misaligned, please return the unit to the factory for realignment.  |
-</WRAP>
-==== Cable Connector ====
+==== Temperature Control Loops ====
 The connections to the TECs and thermistors are made to an 8-pin Hirose connector (see <tabref TECconnectortable> for identity of connectors).  The pin definitions are:
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+==== Safety Information ====
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+The D2-100 is only specified for use with the Vescent D2-105 laser controller, and with cables provided by Vescent.
+</WRAP>
+The D2-100 is a Class 3B CW laser product under the guidelines provided in IEC 60825-01:2014. It has no serviceable parts, and should not be disassembled in the field under any circumstance. Viewing of the beam, either directly, with viewing optics, or from a specular reflection can cause damage to the eye, and should be avoided.
+The D2-100 is available in many wavelengths, listed above, as well as in a high powered configuration. The maximum specified output of any D2-100 is 200mW under normal operating conditions. However, if provided with too much current, some of the high powered (-HP1) lasers can reach 300mW before experiencing critical optical damage. The beam divergence is < 0.08° in both x and y.
+The Maximum Permissable Exposire (MPE) for the D2-100 is 14.45 W*m<sup>-2</sup>, calculated with a >10s exposure time, and the Nominal Ocular Hazard distance is roughly 100m. Proper eye protection for the D2-100 is highly wavelength dependent. We recommend [[https://noirlaser.com/lasershields?input1=780&input2=0&input3=0|this]] online tool, provided by NoIR, and an OD value of at least 3+ for the selected wavelength when choosing the correct eye protection.
+There are four safety stickers present on the D2-100. The first, located on the side of the isolator module, is the explanatory sticker, which states the classification of the laser, and several safety instructions. It reads: "Invisible laser radiation avoid exposure to beam class 3B laser product".
+<imgcaption safety_sticker|Reproduction of Explanatory label on the D2-100. \>{{ :d2:d2-100:sticker.png?200 |}}</imgcaption>
+On the side of the isolator module opposite the explanatory sticker is a sticker which lists the maximum possible output of the laser in mW, the wavelength of the laser, and the name of the IEC certification standard to which the laser adheres.
+<imgcaption IEC_sticker|Reproduction of second Explanatory label on the D2-100.>{{ :d2:d2-100:needed_sticker.png?200 |}}</imgcaption>
+On the top of the D2-100, near the laser aperture, is a "Laser Aperture" sticker.
+<imgcaption aperture|Reproduction of Laser Aperture sticker on the D2-100.>{{ :d2:d2-100:aperature.png?200 |}}</imgcaption>
+Finally, on the sliding beamstop adjacent to the laser aperture, is a triangular laser radiation warning sticker.
+<imgcaption triangle|Laser Radiation Warning sticker on the D2-100.>{{ :d2:d2-100:triangle.png?200 |}}</imgcaption>
+There is only one laser aperture on the D2-100, located on the front with the isolator as shown in (<imgref DBR_laser>).
+Safe operation of the D2-100 necessitates that a compliant laser driver be used to supply a current to the diode. It is important to always correctly set the current limit on any laser driver before energizing the laser system. The D2-100 is a Cathode-Ground laser, and requires a DC current between 0mA and 500mA((Specific current for each laser supplied with test documentation)) to be safely turned on. The connector used to supply current to the D2-100 is a female SMA, which requires a male SMA cable for compatibility.