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Er glass eye-safe laser

Crylink

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Jul 24, 2019
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人眼安全激光器15.jpg
vedio play

1535 solid-state eye-safe laser—Ultra compact eye-safe laser for ranging finder

The wavelength of 1535nm is just in the position of the human eye and the atmospheric window, so it has been widely concerned in the fields of laser ranging and electronic communication. Er,Yb:glass lasers are most commonly used for laser rangefinders with a low pulse repetition rate (less than 10 Hz). Our eye-safe laser have already used in ranging finder and its ranging range is 3-5km with high stability, which applied in Gun aiming and UAV pod.
Lasers with emission wavelengths longer than 1.4 μm are often called “eye-safe”, because light in that wavelength range is strongly absorbed in the eye’s cornea and lens and therefore cannot reach the significantly more sensitive retina. Obviously, the quality “eye-safe” depends not only on the emission wavelength, but also on the power level and the optical intensity which can reach the eye. Eye-safe lasers are particularly important in 1535nm-laser-for-ranging-and-radar cases where light needs to be transmitted over substantial distances in open air. Examples are laser rangefinders and free-space optical communications.

Parameter
Eye-safe Laser Parameter
ParameterUnitMinTypicalMax
Laser wavelengthnm153315341535
working frequencyHz/1-1010
Pulse Widthns4.34.65
Peak powerKw20≥2028
Spot sizemmΦ0.16Φ0.17Φ0.18
Divergence anglemrad91012
Operating temperature˚C-45 – +65-45 – +65-45 – +75
Overall dimensionmm26.3×9.9×7.926.4×10×826.5×10.1×8.1
weightg788.5
Energy Stability(RMS,104shots)%0.60.81
M-SquareNA1.11.21.3
LD Working CurrentA7.57.57.5
LD Working Current pulse widthms1.21.41.7
LD Working VoltageV1.71.81.9
Power ConsumptionW0.0170.0210.033
Beam Alignment Tolerance (Off-axis Angle)mrad1816
Beam Alignment Tolerance (Position(△r))mm0.10.20.3
Storage Temperature˚C-45/80
Operating HumidityR.H.5%40%85%
ShockNA/15g, 0.5ms, 6 shocks/
3 axes, 2 shocks/axis
VibrationNA/20~2000Hz, 0.02g2/Hz/
3 axes, 1hr/axis
Expected LifetimeShots/2×107/

Feature
  • Beam quality near diffraction limit
  • Small volume
  • Low power consumption,
  • No temperature control
  • Open and be used
  • High reliability
  • Good stability
  • Wide temperature range

Application
  • Laser ranging
  • Laser irradiation
  • Laser radar
  • Target recognition
  • Laser medical treatment
  • Optical fiber communication
 

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Anthony P

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Oct 7, 2018
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Interesting device. " Eye safe" due to long wavelength is a bit disturbing.
 

Alaskan

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Jan 29, 2014
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It will still cook your cornea if enough power. That said, agreed, far safer than for example, 1064 nm or any of the vis wavelengths. I am also interested in this wavelength, I purchased a dozen of these rods a couple of years ago, still haven't started a build with them:


I'd like to know how spendy those Crylink units are, I am sure far above most hobbyist budgets.
 
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