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Eye Safe Laser

Eye Safe Laser

Wavelength of 1.4-2.0 um is less harmful to the human eye, so a laser with this wavelength range is called the human eye-safe laser. This wavelength range is located in the atmospheric transmission window, the absorption and scattering of the laser is only 1/50 of the 1.06um laser, which is of...

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description.png

Wavelength of 1.4-2.0 um is less harmful to the human eye, so a laser with this wavelength range is called the human eye-safe laser. This wavelength range is located in the atmospheric transmission window, the absorption and scattering of the laser is only 1/50 of the 1.06um laser, which is of great significance for long distance action, especially for military applications.


Application.png

  • Laser ranging 

  • Laser irradiation         

  • Laser radar           

  • Target recognition           

  • Laser medical treatment           

  • Optical fiber communication

         

Key Feature.png  

  • Beam quality near diffraction limit

  • Small volume

  • Low power consumption,

  • no temperature control

  • Open and be used

  • High reliability

  • Good stability

  • Wide temperature range


parameters.png

Parameter

Unit

Min

Typical

Max

Laser wavelength

nm

1533

1534

1535

working frequency

Hz

 /

1-10

10

Pulse Width

ns

4.3

4.6

5

Peak power

Kw

20

≥20

28

Spot size

mm

Φ0.16

Φ0.17

Φ0.18

Divergence angle

mrad

9

10

12

Operating temperature

˚C

-45˚C - +65 ˚C

-45˚C - +65 ˚C

-45˚C - +75˚C

Overall dimension

mm

26.3×9.9×7.9

26.4×10×8

26.5×10.1×8.1

weight

g

7

8

8.5

Energy StabilityRMS104shots

%

0.6

0.8

1

M-Square

NA

1.1

1.2

1.3

LD Working Current

A

7.5

7.5

7.5

LD Working Current pulse width

ms

1.2

1.4

1.7

LD Working Voltage

V

1.7

1.8

1.9

Power Consumption

W

0.017

0.021

0.033

Beam Alignment Tolerance (Off-axis   Angle)

mrad

1

8

16

Beam Alignment Tolerance (Position(r))

mm

0.1

0.2

0.3

Storage Temperature

OC

-40


80

Operating Humidity

R.H.

5%

40%

85%

Shock

NA


15g, 0.5ms, 6 shocks


3 axes, 2 shocks/axis

Vibration

NA

 /

20~2000Hz, 0.02g2/Hz

 /

3 axes, 1hr/axis

Expected Lifetime

Shots

/

2×107

/


Operating Principle.png

The damage threshold for human eye is high when a laser with a wavelength greater than 1.4 um, because when it is irradiated to the human eye, most of its light intensity is absorbed by the vitreous body, so it is not easy to damage the retina at a certain power.( Taking the 1.57um laser as an example, according to the US national security standards, its safe exposure to human eye is 400 thousand times that of the 1.06um Nd:YAG laser currently used.) So it is called the human eye safety wavelength. In this band, the safest band is located near 1.54um, so there are also people's eye safety limits to 1.5-1.7um, which has a large contrast to the background of many targets, such as vehicles, ships, cement buildings, etc., which is very attractive in laser radar, target recognition and so on.

The following diagram is a structure diagram of a human eye-safe laser.

Theory.png



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