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Natural Science Forum / Physics / Optics / June 2005SP FCBar info
Dear All, I am trying to resurrect a Spectra J80 twin FCBar laser system, with both diode bars shot beyond salvation. 2 things: I had to polish off the (burned to a crisp) AR coatings on the FC connectors - if I cannot get them recoated, will there potentially be enough reflection to blow the diodes? Secondly, the replacement ProLite bars I have do not come with thermistors - I tried to dig out the thermistors (thermocouples?) on the existing heatsinks, but they are too well glued :) At least I got the leads out... Does anyone know what kind of thermistor or thermocouple SP use here? Last but not least, does anyone have any FCBar modules for sale? Thanks, Ilya > I am trying to resurrect a Spectra J80 twin FCBar laser system, with both > diode bars shot beyond salvation. > 2 things: I had to polish off the (burned to a crisp) AR coatings on the FC > connectors - if I cannot get them recoated, will there potentially be enough > reflection to blow the diodes? Are you sure you couldn't just clean them with solvent? That must have been one spectacular blowout. Since there are a lot of weak or dead FCBars floating around (think eBay), it may be better to just replace the fiberoptic cable. However, though most have the same number of emitters but the emitter spacing can be 0.5 mm, 0.65 mm, 0.75 mm, or something else and of course that has to match. > Secondly, the replacement ProLite bars I have do not come with thermistors - > I tried to dig out the thermistors (thermocouples?) on the existing > heatsinks, but they are too well glued :) At least I got the leads out... > Does anyone know what kind of thermistor or thermocouple SP use here? It's just a standard 10K thermistor. > Last but not least, does anyone have any FCBar modules for sale? I may have some usable fiberoptic cables, or know someone who does. --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/ Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/ +Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm | Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html Note: These links are hopefully temporary until we can sort out the excessive traffic on Repairfaq.org. Important: Anything sent to the email address in the message header above is ignored unless my full name is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. Thanks Sam, The fibres were probably run with caps on, the metal of the tips was badly discoloured and the coating severely fried - the only solvent that may have helped would've been hydroflouric acid! And I may not have made myself clear - the back reflection has destroyed - beyond any hope of repair - the diode bars. I would be interested in getting hold of replacement fibres with 0.5mm spacing (for 40W 19-element diode bars) Ilya > > I am trying to resurrect a Spectra J80 twin FCBar laser system, with both > > diode bars shot beyond salvation. [quoted text clipped - 32 lines] > ignored unless my full name is included in the subject line. Or, you can > contact me via the Feedback Form in the FAQs. > The fibres were probably run with caps on, the metal of the tips was badly > discoloured and the coating severely fried - the only solvent that may have > helped would've been hydroflouric acid! So the damage was to the SMA-end, or both ends? > And I may not have made myself clear - the back reflection has destroyed - > beyond any hope of repair - the diode bars. No, I understood that! :( :) > I would be interested in getting hold of replacement fibres with 0.5mm > spacing (for 40W 19-element diode bars) Unfortunately, the only fibers I have are for 0.650 mm I think. --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/ Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/ +Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm | Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html Note: These links are hopefully temporary until we can sort out the excessive traffic on Repairfaq.org. Important: Anything sent to the email address in the message header above is ignored unless my full name is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
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