NBS Technical NoteU.S. Government Printing Office, 1981 |
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Page 1
... . Wavelength . a . Wavelength of maximum power . b . i . Detector responsivity vs. wavelength . Linewidth . i . As it relates to a . ii . C. Coherence length . Chirping of LED . 2. Beam divergence . a . Degree of collimation of.
... . Wavelength . a . Wavelength of maximum power . b . i . Detector responsivity vs. wavelength . Linewidth . i . As it relates to a . ii . C. Coherence length . Chirping of LED . 2. Beam divergence . a . Degree of collimation of.
Page 7
... length in the neighborhood of 1060 nm and a linewidth of about 50 nm . In addition , the peak wavelength depends on temperature , so there is the possi- bility that the spectrum will drift during the course of the pulse ( this is known ...
... length in the neighborhood of 1060 nm and a linewidth of about 50 nm . In addition , the peak wavelength depends on temperature , so there is the possi- bility that the spectrum will drift during the course of the pulse ( this is known ...
Page 10
... length is therefore 100 times greater . It may be argued that the higher coherence of the laser will cause effects that will not be seen when the LED is used as a source . The coherence length of a source is equal to 1 / 2TAV , where Av ...
... length is therefore 100 times greater . It may be argued that the higher coherence of the laser will cause effects that will not be seen when the LED is used as a source . The coherence length of a source is equal to 1 / 2TAV , where Av ...
Page 18
... length of the lens . For example , a 0.1 - mm LED ( such as a GAL 101 ) will give a beam divergence of 0.2 mrad when collimated by a 50 - cm lens . In addition , Appendix B shows how to calculate the acceptable amount of focus error for ...
... length of the lens . For example , a 0.1 - mm LED ( such as a GAL 101 ) will give a beam divergence of 0.2 mrad when collimated by a 50 - cm lens . In addition , Appendix B shows how to calculate the acceptable amount of focus error for ...
Page 19
... length of the lens times the acceptable beam divergence exceed the total luminous diameter of the LED . The nonuniform near field will not affect the uniformity of the beam across the surface of the collimating lens . The beam ...
... length of the lens times the acceptable beam divergence exceed the total luminous diameter of the LED . The nonuniform near field will not affect the uniformity of the beam across the surface of the collimating lens . The beam ...
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antenna attenuation Backscatter response backscatter signal backscatter signature beam beam divergence Bureau of Standards C3Hg calculated calibration capture fractions components coupling loss dBV/m densimeter DEPARTMENT OF COMMERCE detector diameter diode dipole electric field electronic engineering equation experimental far-field fault signature Federal field distortion due field intensity field strength Figure frequency function graded-index fiber Haynes Hiza IEEE Trans index fibers input instrument isotropic Laboratory laser laser diode leaky modes lens logarithmic Magnetic field distortion measurement metering unit methane microbending MIXTURE mode filter mole fraction N₂ National Bureau near-field numerical aperture optical fiber OTDR output parameters peak percent perfectly conducting cylinder potentiometer pulse radiation angle radiation monitor range Rayleigh scattering Report Resistor scan Science sensor step-index fiber switch Table Tech technical Technology temperature transverse electromagnetic cell U.S. DEPARTMENT voltage waveguide wavelength ZERO
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