The life tome if fiber cable, barring rats of backhoes, is depenand on the bend radius and any dynamic movement. Other issuses are thermal shock. This has all be calculated and enforce by TELCORDIA. All fiber race ways are made to maintain a minimal bend radius.
Resently, these radii sepcs have...
For shock resistance you want to go as thin as you can. The integrity of the mount is most imprtanat. Depending on how you mount, any flexure will crack the window.
There are several way to mount the window. If space is critical, i would sugest a cirular window. Machine the mount so that the...
You have to be careful. The published values for INVAR 36 (free Machine) and alloy 32 (SUPER) are quite old. It turns out the alloy has changed over the years. I dont know what you are doing, but my guess is you whould probably lean toward the 32 alloy and follow its heat treat and stress...
near field pertaien to the fundamentl order defraction of an field. In the far field, this disapears and you are viewing the higher order maxima of a feild. The far the fourier transform of the near. This is why and image through binoculars darken when an object is in front within the near...
An interferometric system can easily resolve in the milliradian region. There are several "white Light" systems with demodulators that are available for OTC (optical coherence tomography) Similar system can measure suface imperfection on hard drive media and a pretty fast rate.
the main problem you have is that material you are lasing is optically transparent. You will have to find out its absorption characteristics, then see if a there is a laser out there that can do the job at that wavelength that wont be too big or powerful - will give you osha nightmares.
next...
ok you guys, the answer is that the yittrium vanadate laser if using a diode laser to pump or exite it. this is called solid state diode pumping. The pump lasers will alway be more powerful as the yvo has a quantum efficiency of about 50%, much less in the real worl....so when it is opem, you...
ANY Green alser......and old KTP doubled Solid State Diode Pumped (SSDP) laser, a Ti Saphire SSDp laser, one of the newer solid state green lasers....you can find cheap ones from several chinese companies........CASIX being one of them.
Have worked on thses types of prjocts before. In reality...
Try Contacting Optiphase inc in Van Nuys, CA...we ran that experiment when we developed a non contact interferometric based vibrometer for measuring the flatness of hard drive discs
you will need to use a green source. if you are going to map. sounds you will need and interferometer based system with a rang finder.....depending on how much mapping you need. Look at the OCT system, they are currently being developed as mini 3D imagers inside arteries.
for just plain...
I know the guy who design a borescope for edmund scientific, at a good price. In the pasrt I worked with a company called POC in Torrance CA. Thhere we developed and interferometric scope that aslo contained a range finder, lamps and color CCD in a 3/8 in diameter. It was developed to measure...
well, Optical Fibers as the were originally called are besically a wave guide which transmit a single evensecent field in the case of single mode fibers. TheTransmission of light is actually the containment of the optical energy at the prescibed wavelength, This field acuatlly "spills' into...
You might try going with an interferrometric system in which the demodulation scheme can measure at any point along the fiber thus alowing thermal gradient correction.
Try Optiphase in Van Nuys, CA
Not an EE, But been working in pfotonics R&D primarily optical and packaging design. Remember, there is no such yhing as negative light. so you will have to run the PD at a bias. you will have to determine the PD's quiescent point with the particular op amp such that you achieve the highest...
