Laser Diodes

6475 Laser Diodes from 104 manufacturers listed on GoPhotonics

Find & compare laser diodes from the leading manufacturers. Use the parametric search tools to narrow down on laser diodes based on your requirement.

Description: Pulsed Laser Diodes with Homogenized Beam
Type:
Free Space Laser Diode
Configuration:
Single Emitter, Stack
Package Type:
TO-Can
Wavelength:
895 nm, 905 nm, 915 nm
Output Power:
25 W
Threshold Current:
500 mA
Reverse Voltage:
6 V
more info View products from this company
Description: 30W Pulsed Laser Diode for LiDAR Applications With TO56 Mini
Type:
Free Space Laser Diode
Package Type:
TO-Can
Wavelength:
1250 nm
Output Power:
13 W
Operating Current:
35 A
Operating Voltage:
7.9 V
Threshold Current:
1000 mA
more info View products from this company
Description: 785 nm Distributed Feedback Laser Diode for Metrology & Interferometry Applications
Type:
Free Space Laser Diode
Configuration:
Single Emitter
Technology:
Distributed Feedback (DFB)
Package Type:
TO-Can
Wavelength:
785 nm
Output Power:
100 mW
Operating Current:
0.17 A
Threshold Current:
70 mA
Reverse Voltage:
2 V
more info View products from this company
Description: 775nm Narrow Linewidth Laser diode
Type:
Fiber-Coupled Laser Diode
Technology:
Fiber-Bragg-Grating (FBG)
Package Type:
Butterfly
Wavelength:
775 nm
Output Power:
20 mW
Operating Current:
60 to 90 mA
Operating Voltage:
1.3 to 2.5 V
Threshold Current:
40 mA
Fiber Modes:
Polarization Maintaining
more info View products from this company
Description: S Series Submounts 975 nm 50 µm emitter Multimode, Continuous Wave (CW)
Type:
Free Space Laser Diode
Configuration:
Single Emitter
Package Type:
Sub-Mount
Wavelength:
975 nm
Output Power:
1 W
Operating Current:
1.3 to 1.5 A
Operating Voltage:
1.7 to 2.2 V
Threshold Current:
200 to 300 mA
more info View products from this company
Description: 763 nm VCSEL Laser Diode in TO-Can Package
Type:
Free Space Laser Diode
Configuration:
Single Emitter
Technology:
Vertical-Cavity Surface-Emitting Laser (VCSEL)
Package Type:
TO-Can
Wavelength:
763 nm
Output Power:
0.25 to 0.7 mW
Operating Current:
2 mA
Operating Voltage:
2 V
Threshold Current:
0.5 mA
more info View products from this company
Description: 830 nm Fabry-Perot Quantum Well Laser Diode for LiDAR & Machine Vision Applications
Type:
Free Space Laser Diode
Configuration:
Single Emitter
Technology:
Quantum Well
Package Type:
TO-Can
Wavelength:
830 nm
Output Power:
220 mW
Operating Current:
225 mA
Operating Voltage:
2.3 V
Threshold Current:
38 mA
more info View products from this company
Description: Instrument Laser Modules for Pulsed / CW Applications
Type:
Fiber-Coupled Laser Diode, Free Space Laser Diode
Package Type:
Butterfly, DIP, TO-Can Pigtailed, TO-Can
Wavelength:
1310nm, 1490nm, 1550nm, 1625nm, 1650nm
Output Power:
Upto 0.075 W (CW), Upto 0.2 W (Pulsed)
Operating Current:
1 A
Operating Voltage:
3 V
Threshold Current:
30 to 45 mA
Fiber Modes:
Single Mode, Multi-Mode
more info View products from this company
Description: Single-Mode LD
Type:
Free Space Laser Diode
Configuration:
Single Emitter
Package Type:
TO-Can
Wavelength:
410 to 420 nm
Output Power:
0.12 W
Operating Current:
0.11 A
Operating Voltage:
4.7 V
Threshold Current:
34 to 50 mA
Fiber Modes:
Single Mode
more info View products from this company
Request Quote
Type:
Free Space Laser Diode
Package Type:
Bar
Wavelength:
760 to 1700 nm
Output Power:
600, 1920, 2400, 2880, 50000 W (Peak)
Operating Current:
35 to 1100 A
more info View products from this company
Description: Fiber Pigtailed Laser Diode, 1550 nm, 1.5 mW, 9/125 Single-mode, FC
Type:
Fiber-Coupled Laser Diode
Technology:
Fabry-Perot Laser (FP)
Package Type:
TO-Can Pigtailed
Wavelength:
1550 nm
Output Power:
0.0015 W
Operating Current:
0.07 A
Threshold Current:
20 mA
Fiber Modes:
Single Mode
more info View products from this company
Description: 795nm Spectrally Narrowed Fiber-Coupled Laser Diode
Type:
Fiber-Coupled Laser Diode
Package Type:
Module, Bar
Wavelength:
795 nm
Output Power:
180 W
Operating Current:
40 to 50 A
Operating Voltage:
14.3 to 15 V
more info View products from this company
Description: 10 W, 900 to 930 nm, 102 to 108 µm Fiber-Coupled Laser Diode
Type:
Fiber-Coupled Laser Diode
Wavelength:
900 nm, 925 nm, 930 nm
Output Power:
10 W
Operating Current:
3.2 to 3.3 A
Operating Voltage:
2 V
more info View products from this company
Description: Pulsed Semiconductor Laser Diode from 895 to 925 nm
Type:
Free Space Laser Diode
Configuration:
Single Emitter
Package Type:
Through-Hole
Wavelength:
895 to 925 nm
Output Power:
75 to 85 W
Operating Voltage:
13.5 V
Threshold Current:
1.5 A
Reverse Voltage:
40 V
more info View products from this company
Description: 808 nm Fiber Coupled QCW Laser Diode Bar Modules
Type:
Fiber-Coupled Laser Diode
Configuration:
Conductive Cooled
Package Type:
Bar, Module
Wavelength:
808 nm
Output Power:
150 W
Operating Current:
175 A
Operating Voltage:
2.5 V
more info View products from this company
1 - 15 of 6475 Laser Diodes

What is a Laser Diode?

A laser diode is a type of semiconductor device that converts electrical energy directly in to a focused beam of light. It is similar to a LED (light-emitting diode) however is much more focused. The term LASER stands for Light Amplification by stimulated emission of Radiation. Laser diodes can emit light beams ranging from the infrared to the UV spectrum. The laser diodes are ideal for fiber-optic communications, CD/DVD reading/recording, laser scanning, laser printing, and barcode reader applications.

Figure 1: Laser Diode

In a laser diode, there are usually two layers of doped gallium arsenide that forms a PN junction. There is a partially reflective surface at the P end and a highly reflective surface at the opposite (N) end. The P has an external lead which is called an anode and N has an external lead which is called a cathode. The intrinsic un-doped active region between P and N-type semiconductors is responsible for the electron and hole recombinations which results in better a output power. An extra PIN photodiode is also placed with the laser diode chip to monitor the laser diode output and reduce the back reflection to the cavity.  

How does it work?

Figure 2: Stimulated Emission

When a laser diode is forward biased, electron and hole recombinations occur in the PN junction. During recombination, the electrons lying in the conduction band of the N region (higher energy level) fall into the valance band of the P region (low energy level), which releases energy in the form of photons. Now, these emitted photons reflect back and forth between the reflective surfaces and strike other atoms which lead to more recombinations and release more photons with the same phase (stimulated emission). When the photons' activity becomes so intense at a certain point, a strong beam of laser light will come out from the partially reflective surface of the diode. This laser light is coherent in characteristics, i.e., all the emitted photons have the same frequency and phase.

In non-coherent light with a single frequency (for example, an Incandescent lamp), the light has a deviation in phase. But, in a coherent light (for example, laser light), the light has the same frequency as well as phase.

Figure 3: Understanding coherent and non-coherent light

Figure 4: Laser Diode P-I characteristics

Materials used for fabrication:

The choice of direct bandgap semiconductor material used to fabricate the laser diodes decides the wavelength of the emitted beam. For example, InGaN (indium gallium nitrate) will emit the beam of light with a wavelength of 405 nm (visible). InGaAsP (indium gallium arsenide phosphide) will emit the beam of light with a wavelength of 1654 nm (infrared).

Types of laser Diode:

  • Double heterostructure laser diode.
  • Quantum well laser diode.
  • Quantum cascade laser diode.
  • Interband cascade laser diode.
  • Distributed Bragg reflected laser diode (DBR).
  • Distributed feedback laser diode.
  • Vertical cavity surface-emitting laser diode (VCSEL).
  • Vertical external-cavity surface-emitting laser diode (VECSEL).
  • External cavity diode laser.
  • Separate Confinement Heterostructures Laser Diode.

Powered by Froala Editor

Have a Custom Requirement?

Filters

Manufacturers from 

Output Power (W)  

Configuration 

More

Fiber Modes 

Package Type 

More

Operating Voltage (V)  

Operating Current (A)  

Threshold Current (mA)  

Stack/Array 

Tags 

Need Help Finding a Product?

Looking for a Product or Supplier?

Let us know what you need, we can help find products that meet your requirement.