Low drive current. Minimal power consumption.

VISIIIBLES^RGB Laser Diodes

Best in class, low threshold laser diodes designed for next generation low power consumption systems and applications.
In addition, Exalos also offers state-of-the-art LDs in a wide range of wavelengths with tailored performance to customer needs.

Scroll down to RGB Laser Diodes

Advanced miniaturized

RGB Laser Modules

Ultra-compact (50mm³ volume) light module prototypes based on red, green and blue laser diodes currently available.

Scroll down to RGB Modules

Please contact our Sales team for all information.

PRODUCTS & SPECIFICATIONS

Specifications and typical performance curves can be downloaded below.

OUR DEVELOPMENT

Thanks to the tremendous investments, followed by industry-leading success over the last years, EXALOS developed RGB laser diodes that can address the key requirements for free-space reflective displays.

The visible laser diodes break new ground for low drive currents and minimal power consumption delivering a few milliwatts of optical power at a fraction of the drive current of commercially available lasers. EXALOS low-power blue and red laser diodes have threshold currents as low as 5 mA and operate below 10 mA, while the green variants start lasing near 15 mA and run between 20 mA and 30 mA.

From our Blog:

Next generation RGB edge-emitting lasers for Augmented Reality

IEEE Photonics Technology Letters (Volume: 33, Issue: 22, Nov.15, 15 2021):, DOI: 10.1109/LPT.2021.3115603
Ultra-Low Threshold and Temperature-Stable InGaN Blue and Green Laser Diodes

Device and module customization

EXALOS provides excellent customization capabilities and can produce tailored lasers in terms of wavelength, design, and device performance in the visible range.
EXALOS expertise also covers the laser source integration into complex modules such as fiber-coupled and combined multiple emitters.

VISIIIBLES^RGB Laser Diodes

A breaktrough technology, providing low drive currents and minimal power consumption.

Red, Green and Blue edge-emitting lasers

In-house technology for all three primary colours.

All key requirements for head-mounted displays

Minimal power consumption
Exceptional efficiency
Long lifetime

Ultra compact size. Highly customizable.

A breakthrough for weight, dimensions and the overall form factor. Overcoming intrinsic limitations.

Designed for next generation systems and applications

Augmented Reality Glasses with low-power consumption AR-displays that operate with reflective combiners
Fluorescence microscopy, flow cytometry and medical imaging/diagnostics
Miniaturized Head-up displays (military, car info systems, virtual mirrors, infotainment systems)

Next generation RGB edge-emitting lasers for Augmented Reality

Red, green and blue edge-emitting lasers with milliwatt output powers and exceptional efficiency are lining up for augmented-reality applications.

READ ALL DETAILS IN OUR BLOG.

Learn more

Our RGB Laser products

Custom-made Lasers

RED Laser

Blue Laser

Green Laser

488 nm

A RAINBOW OF POSSIBILITIES

EXALOS can produce tailored lasers with any emission wavelength between 400 and 525 nm, and between 635-660nm. State-of-the-art performance can be provided by modules with free-space or fiber outputs.

Our expertise also includes producing tuneable lasers and spectrally-combined LD and SLED sources, making the use of advanced automated assembly processes to position and align optical elements (fibers, lenses, …) with submicron accuracy.

Please contact our Sales team for more information.

Wavelength (nm)	Threshold (mA)	Slope (W/A)
400-460	5 to 35	0.5 to 1.8
460-500	10 to 60	0.3 to 1.3
500-520	15 to 80	0.2 to 0.8
630-660	5 to 30	0.5 to 1.5

Red Laser diode with 10 mW typical optical output power (TO-56)

Part No. ELA350006

A low threshold laser diode. Ideal for low power dissipation in display applications, metrology or spectroscopy.

Preliminary Specifications *

Centre wavelength:	640 nm
Out power (max):	15 mW
Forward current (max):	40 mA

Blue Laser diode with 5 mW typical optical output power (TO-56)

Part No. ELA350004

A low threshold laser diode. Ideal for low power dissipation in display applications, metrology or spectroscopy.

Preliminary Specifications *

Centre wavelength:	455 nm
Out power (max):	10 mW
Forward current (max):	40 mA

Green Laser diode with 5 mW typical optical output power (TO-56)

Part No. ELA350005

A low threshold laser diode. Ideal for low power dissipation in display applications, metrology or spectroscopy.

Preliminary Specifications *

Centre wavelength:	515 nm
Out power (max):	10 mW
Forward current (max):	70 mA

Blue-Cyan Laser diode with 60 mW typical optical output power (TO-56)

New generation 488nm Fabry-Perot laser diodes (FP-LDs) with best-in-class conversion efficiency, good control of emission wavelength and long-term reliability. The laser comes in a 5.6 mm hermetic package including monitor photodiode. Ideal for low power dissipation in display applications, metrology or spectroscopy.

Specifications *

Centre wavelength:	488 nm
Out power (max):	70 mW
Forward current (max):	100 mA

Maximum Ratings

Parameter	Min	Max	Unit
Output power	–	70	mW
Forward current		100	mA
Reverse voltage		-2	V
Forward voltage		7.0	V
Storage temperature	-40	85	°C

Operating characteristics (Tcase: 25 °C)

Parameter	Min	Typ	Max	Unit
Output power	–	60	–	mW
Forward current		75	90	mA
Forward voltage	–	5.5	6.5	V
Centre wavelength	486	488	490	nm
SA farfield (FWHM)	6	9	12	deg
FA farfield (FWHM)	20	25	28	deg
MPD photocurrent	–	60	–	mA

* All characteristics, measurements and specifications are relative to a particular device under test. Device to device variations may occur on a different set of samples.

PRODUCTS & SPECIFICATIONS

Besides our RGB LDs, we offer special customized products. Please get in contact with our experts to get a list of all available solutions.

ADVANCED MINIATURIZED RGB MODULES

Miniaturized, full-color RGB light source module for near-to-eye display systems

EXALOS demonstrated an ultracompact and lightweight RGB LD module with a collimated output beam realized with micro-optical free-space components.

Prototypes are currently available for the development of near-to-eye display systems.

Learn more about this module in our Blog

IN DETAIL

The package has a footprint of 4.4 mm x 4.15 mm with a height of 2.9 mm (0.053 cm3).

The module delivers low-divergent and collinear RGB output beams having a high circularity and a diameter of 250-650 μm at a reference distance of 50 mm.

10 mW optical output power per colour with a maximum electrical power consumption of ≈600 mW (all sources on).

You are interested in our VISIIIBLES LASER DIODES?
You are developing next generation applications, based on miniaturized RGB optical engines?

Our experts and development team are ready to help.

GET IN CONTACT +

GaN-based superluminescent diodes with long lifetime.

A. Castiglia, M. Rossetti, N. Matuschek, R. Rezzonico, M. Duelk, C. Vélez, J-F Carlin, N. Grandjean
Date Published: 26 February 2016, doi: 10.1117/12.2212699, Proc. SPIE 9748, Gallium Nitride Materials and Devices XI, 97481V

Findings:

Modules with standard and optimized p-type layers were tested in terms of lifetime, at a constant output power of 10 mW, in continuous-wave (CW) operation and at a case temperature of 25°C. The results show that the p-dopant concentration affects both IV characteristics and LI laser characteristics. The modules with non-optimized p-type doping showed a fast and remarkable increase in the drive current during the first hundreds of hours, together with an increase of the device series resistance.

The residual drop in output characteristics observed over 2000 hours of device operation was found to be power-dependent and most likely related to the ageing of the mirror facets.

Based on the test results, Hydrogen diffusion is probably responsible for the quick degradation process. During the first hundred hours of the test, hydrogen slowly diffuses towards the p-metal/semiconductor interface, passivating the Mg acceptors in the GaN contact layer, and thus leading to an increase in the device contact resistance. A high Mg-doping level (above 2×1019 cm-3) is likely to lead to the formation of compensating defects (e.g., inversion domains and/or pyramidal defects). The poor p-type quality is responsible for high series resistances and non-uniform current injection into the active region, resulting in lower optical output powers under CW operation. Additionally, complete hydrogen removal could not be achieved with the thermal activation process in such highly-doped layers.

(a) LI characteristics of SLEDs with optimized p-doping profile;
(b) emission spectra for an injected current of 150 mA.

In contrast to these findings, the devices with optimized p-type layers showed no considerable degradation of the electrical characteristics after 2000 hours. The output power drop after this time was limited to 6%. The samples with optimized Mg-doping levels achieved a higher hydrogen removal with the post-growth thermal annealing than highly-doped samples. Under the specific test conditions, the estimated lifetime for those devices was higher than 5000 hours. Furthermore, maximum output powers as high as 350 mW (for an injection current of 500 mA) have been achieved in CW operation at room temperature.

(a) Long-term stress test at a constant power of 10 mW at 25 °C. A lifetime of at about 5000 h can be
extrapolated based on a 35% increase in the injection current end of life criterion;
(b) IV characteristics before and after 2000 h stress test.

Electrical Long-term Reliability

No electrical degradation was observed during lifetime testing over several thousand hours of operation!

Electrical Long-term Reliability

Modules were tested under constant-power mode (Pout = 10 mW ; Tcase = 25 ºC).

Projected lifetime: 5000h
(failure criteria defined as a 35% drive current increase)
Degradation rate ~ 0.005 mA/h after 2000h.

ESC TO CLOSE

VISIIIBLES^RGB Laser Diodes

RGB Laser Modules

OUR DEVELOPMENT

Device and module customization