Laser Diodes

6088 Laser Diodes from 96 manufacturers listed on GoPhotonics

A Laser Diode is a type of semiconductor device that produces coherent light through the process of stimulated emission. Laser Diodes from the leading manufacturers are listed below. Use the filters to narrow down on products based on your requirement. Download datasheets and request quotes for products that you find interesting. Your inquiry will be directed to the manufacturer and their distributors in your region.

Description: 525 nm Fiber-coupled Laser Diode for Target Designation & Remote Source Lighting
Type:
Fiber-Coupled Laser Diode
Package Type:
HHL
Wavelength:
525 nm
Output Power:
4 W
Operating Current:
2 A
Operating Voltage:
DC to 12 V
Threshold Current:
0.3 A
Fiber Modes:
Multi-Mode
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Description: High Power 14-Pin DFB Butterfly Fiber Module
Type:
Fiber-Coupled Laser Diode
Technology:
Distributed Feedback (DFB)
Package Type:
Butterfly, Fiber Pigtailed
Wavelength:
1310 nm
Output Power:
60 mW
Operating Current:
1.2 mA
Operating Voltage:
2 V
Threshold Current:
<30 mA
Fiber Modes:
Single Mode, Polarization Maintaining
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Description: 808 nm CW Multimode Laser Diode for Defense & Medical Applications
Type:
Free Space Laser Diode
Configuration:
Single-Emitter
Package Type:
Sub-Mount
Wavelength:
808 nm
Output Power:
6 W
Operating Current:
6.2 to 7.1 A
Operating Voltage:
1.9 to 2.4 V
Threshold Current:
0.9 to 1.1 A
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Description: 1064nm Single Frequency With 25mW Output Laser diode
Type:
Fiber-Coupled Laser Diode
Technology:
Distributed Feedback (DFB)
Package Type:
Butterfly
Wavelength:
1063 nm, 1064 nm, 1065 nm (Center)
Output Power:
8 to 25 mW
Operating Current:
170 mA
Operating Voltage:
5 V
Threshold Current:
70 mA
Reverse Voltage:
2 V
Fiber Modes:
Polarization Maintaining
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Description: 658 nm Multi-Chip Laser Diode for Industrial & Medical Applications
Type:
Fiber-Coupled Laser Diode
Configuration:
Single-Emitter
Package Type:
HHL Pigtail
Wavelength:
658 nm
Output Power:
2.5 W
Operating Current:
1.6 A
Operating Voltage:
8.6 V
Threshold Current:
0.4 A
Reverse Voltage:
0 V
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Type:
Free Space Laser Diode
Configuration:
Single-Emitter
Technology:
Distributed Feedback (DFB)
Package Type:
TO-Can
Wavelength:
1690 nm
Output Power:
0.005 W
Operating Current:
85 to 120 mA
Threshold Current:
15 to 45 mA
Fiber Modes:
Single Mode
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Description: 1540.4 nm Wavelength-Stabilized Single-Mode Fiber Coupled DFB Laser Diode
Type:
Fiber-Coupled Laser Diode
Package Type:
Butterfly
Wavelength:
1528 to 1565 nm
Output Power:
100 mW
Operating Current:
0.626 A
Operating Voltage:
1.9 V
Threshold Current:
40 to 80 mA
Fiber Modes:
Single Mode
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Description: 1064 nm Multimode Laser Diode arrays
Type:
Free Space Laser Diode, Fiber-Coupled Laser Diode
Configuration:
Single-Emitter
Package Type:
CS-Mount, Bar
Wavelength:
1064 nm
Output Power:
40 mW
Operating Current:
30000 mA
Operating Voltage:
1.4 V
Threshold Current:
5000 mA
Fiber Modes:
Multi-Mode
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Description: 980 nm Fiber Bragg Grating Pump Module for Telecommunication Industry
Type:
Fiber-Coupled Laser Diode
Configuration:
Multi-Emitter
Technology:
Fiber-Bragg-Grating (FBG)
Package Type:
Butterfly
Wavelength:
980 nm
Output Power:
800 to 1600 mW
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Description: 1653.7nm DFB Laser Chip
Type:
Free Space Laser Diode
Technology:
Distributed Feedback (DFB), Multi-Quantum Well (MQ...
Package Type:
Chip
Wavelength:
1653.7 nm
Output Power:
5.5 mW
Operating Current:
80 to 120 mA
Operating Voltage:
1.3 to 2 V
Threshold Current:
5 to 10 mA
Reverse Voltage:
2 V
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1 - 10 of 6088 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.

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