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1535nm erbium glass applied into laser rangefinders

Long-distance laser rangefinders have characters with low power consumption, small size and high in accuracy and safety. Currently, 1064nm emission wavelength, generally applied into laser rangefinders, is harmful for our retina and will bring hidden problems for our safety. Therefore, it is necessary to develop 1535nm eye-safe lasers and it will become a inevitable trend for future industry in photon-electricity field. 1535nm eye-safe laser has applied in hand-held laser rangefinders, pods, and frontier monitoring.

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                      FIGURE 1

Ranging process of laser rangefinders is showing as following. It consists of four parts-laser transmitting module, optical transceiver system, laser receiving system, and signal processing system. Erbium glass solid-state lasers, has applied into eye-safe laser rangefinders, is able to produce 1535nm laser with hundreds μJ, low repetition rate and narrow pulse width. To get accurate ranging information, it takes InGaAs APD as detector and TDC to measure flying time.

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                                                                                                   FIGURE 2

 Erbium Tech has developed eye-safe lasers with small size, high peak power and stability for laser rangefinders. Its pulse energy ranges from 100μJ to 500μJ. And there are two options for packaging-TO packaging and traditional packaging. It has gained high reputation from our customers. Parameters of 1535nm eye-safe lasers are shown as following:

 

Parameters

Type#

 EL-201

(100μJ)

 EL-202

(200μJ)

 EL-203

(300μJ)

 EL-204

(400μJ)

EL-205

(500μJ)

Wavelength

1535 nm

1535 nm

1535 nm

1535 nm

1535 nm

Laser Energy(Min./Typ.)

132 μJ / 134 μJ

200 μJ / 240 μJ

300 μJ / 320 μJ

400 μJ / 420 μJ

480 μJ / 510 μJ

Laser Pulse Width, Typ.(FWHM)

3 . 5 ns

3.5 ns

3.5 ns

3.5 ns

3.5 ns

Pulse Repetition Rate 

1~20 Hz

1~10 Hz

1~20 Hz

1~20 Hz

1~10Hz

Pulse Energy Stability

10%

10%

10%

10%

10%

Beam diameter

0 .2 mm

0.2 mm

0.2 mm

0.2 mm

0.2 mm

Beam Divergence

<10 mrad

<10 mrad

<10 mrad

<10 mrad

<10 mrad

Spots mode

TEM00

TEM00

TEM00

TEM00

TEM00

Operating Temperature

-45 ℃~+65 ℃

-45 ℃~+65 ℃

-45 ℃~+65 ℃

-45 ℃~+65 ℃

-45 ℃~+65 ℃

Storage Temperature

-55 ℃~+85 ℃

-55 ℃~+85 ℃

-55 ℃~+85 ℃

-55 ℃~+85 ℃

-55 ℃~+85 ℃

Shock

1500 G, 0.5 ms

1500 G, 0.5 ms

1500 G, 0.5 ms

1500 G, 0.5 ms

1500 G, 0.5 ms

Vibration

20~2000 Hz/20 G

20~2000 Hz/20 G

20~2000 Hz/20 G

20~2000 Hz/20 G

20~2000 Hz/20 G

Lifetime(MTTF)

>50 million shots

>50 million shots

>50 million shots

>50 million shots

>50 million shots

Dimension

30×18×7 mm

30×18×7 mm

30×18×7 mm

41×18×12 mm

50×18×12 mm

Weight

6g

6g

6g

7g

8g

Electric Requirements

2 V, 6 A, 2ms

2 V,11A, 1.8ms

2 V, 14A, 2.5ms

2 V, 15A, 2.5ms

2 V, 16.5A, 2.5ms

Integrated Photodiode

Optional

Optional

Optional

Optional

Optional

                                                                                                         FIGURE 3

 

For more details of eye-safe lasers, please visit our website:

https://www.erbiumtechnology.com/eye-safer-laser/

E-mail: devin@erbiumtechnology.com

WhatsApp: +86-18000520222

Fax: +86-2887897578

Add: No.23, Chaoyang road, Xihe street, Longquanyi distrcit, Chengdu,610107, China.


Update Time: Jun-20-2022