1550nm Er Glass Eye Safe Laser

Description

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 great significance for long distance action, especially for military applications.

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

Key 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

Theory
Small volume
Low power consumption
Good stability
High reliability
Feature

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.

Laser wavelength : 1550nm
working frequency: 10Hz
Pulse Width: 5ns
Peak power: 28Kw
Spot size:Φ0.18
Divergence angle: 12mrad
Operating temperature: -45˚C – +75˚C
Overall dimension: 26.5×10.1×8.1mm
weight:8.5g
Energy Stability(RMS,104shots): 1%
M-Square: 1.3NA
LD Working Current: 7.5A
LD Working Current pulse width: 1.7ms
LD Working Voltage: 1.9V
Power Consumption:0.033W
Beam Alignment Tolerance (Off-axis Angle):16mrad
Beam Alignment Tolerance (Position(△r)):0.3mm
Storage Temperature:80OC
Operating Humidity:85%
Shock: 15g, 0.5ms, 6 shocks/ 3 axes, 2 shocks/axis
Vibration:20~2000Hz, 0.02g2/Hz/ 3 axes, 1hr/axis
Expected Lifetime:2×107

Operating principle
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.

Please kindly check the datasheet as following :
1550nm Eye Safe Laser

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