Spectroscopy
Module
Vescent Photonics, Inc.
www.vescentphotonics.com
4865 E. 41
st
Ave
Denver, CO 80216
Phone: (303)-296-6766
Fax: (303)-296-6783
Page 1: ...Spectroscopy Module Vescent Photonics Inc www vescentphotonics com 4865 E 41st Ave Denver CO 80216 Phone 303 296 6766 Fax 303 296 6783 ...
Page 2: ...rviceable parts inside the instrument Work performed by persons not authorized by Vescent Photonics may void the warranty CAUTION Although ESD protection is designed into the instrument operation in a static fee work area is recommended WARNING To avoid electrical shock hazard connect the instrument to properly earth grounded 3 prong receptacles only Failure to observe this precaution can result i...
Page 3: ... repair attempts made without authorization by Vescent Photonics from damage caused by operation of equipment outside of its specified range as stated in either the product specification or operators manual from damage due to improper connection to other equipment or power supplies This warranty is in lieu of all other warranties including any implied warranty concerning the suitability or fitness...
Page 4: ...bsolute Maximum Ratings Note All modules designed to be operated in laboratory environment Parameter Rating Environmental Temperature 15 C and 30 C Environmental Humidity 60 Environmental Dew Point 15 C ...
Page 5: ...ompensates for intensity drifts giving stable control over the lock point for side locking applications Two beamsteering adjustments are provided for optimizing overlap of the counter propagating beams and positioning on the signal photodiode The photodiode output is shot noise limited out to 12 MHz for photocurrents of 50 µA and above The high bandwidth of the feedback enables tight solid locking...
Page 6: ...vel 80 nV Hz Set Temperature 35 C Temperature Stability 0 01 C Beam Height 0 95 inches Total package Size L x W x H 4 25 x 4 x 2 inches 6 Output Input Ref PD Signal PD Fine steering adj Focusing lens Rb Cell Signal SMA Course adj x y Cable connector Input beamsplitter Telescope Output Input Ref PD Signal PD Fine steering adj Focusing lens Rb Cell Signal SMA Course adj x y Cable connector Input bea...
Page 7: ...positioning onto the signal photodiode and also to control the retro reflection of the reflecting mirror Figure 1 inset Fine vertical and horizontal beam positioning The spectroscopy module contains a focusing lens for the signal photodiode on a spring loaded mount with 2 56 screws for fine adjustment of the beam onto the photodiode Figure 1 1 4 Aligning the Spectroscopy Module The spectroscopy mo...
Page 8: ...diode see Figure 1 Make adjustments as necessary 6 Retighten the locking screws on the DBR module 7 Use the card to ascertain the position of the returned beam on the first corner mirror 8 Use the course positioning controls to place the retro reflected beam as close as possible to the incoming beam 9 Use the card to probe the opposite corner mirror along short side to see if the retro beam is now...
Page 9: ...cond card lengthwise light goes through a single layer and block the reference photodiode while monitoring the SMA OUTPUT on an oscilloscope or voltmeter 13 Use the Course and fine steering controls to maximize the signal actual signal is negative on the voltmeter Generally the fine steering controls have little effect You might find them useful if you wish to use the course controls to center the...
Page 10: ...to the ERROR INPUT monitor or until an eyeball average of the hyperfine transitions lies near zero volts This step determines how well the balancing circuit cancels intensity drifts Note for peak locking applications this is not important since dc drifts have no affect on the lockpoint 16 The spectroscopy module is now ready for use Replace the cover 10 ...
