TO - Laser Diode Measurement
Chips 4 Light bietet nicht nur eine große Auswahl an Laserdioden, sondern auch zusätzliche Dienstleistungen zur
Chips 4 Light not only offers a broad selection of laser diodes, but also additional services for characterizing and selecting individual diodes. We offer customized measurement of TO38 and TO56 under controlled temperature conditions according to:
- Wavelength
- Optical power
- Constant power measurement via external photodiode
- CW (continuous wave) and QCW (quasi-continuous wave -> pulsed) measurements
- Beam measurement: Measurement of the elliptical laser beam with a high-resolution camera for characterization of the parallel and perpendicular beam angles, measurement of the viewing angle, alignment definition of TO lasers, bare laser chips, and customer-specific setups
Our specially developed measurement station enables us to characterize individual TO housings according to power and wavelength. This means that our customers receive specifically specified products and do not have to purchase a wide range of variations in trays, which typically contain large quantities.
For example, according to the data sheet, a typical green TO56 laser has a peak wavelength deviation of approximately 20 nm. The diodes we measure can be selected with a tolerance of only 2 nm. You get exactly what you need, and that is virtually unheard of anywhere else.
Optoelectronics is our expertise
- Offer of miniaturized light sources
Special requirements, for example in sensor technology or medicine, often require particularly small light sources such as point light sources. We have an idea. - Specification for your project
In our range of extensive optoelectronic components we will find the right solution for you together. - Sorting according to customer specifications
At Chips 4 Light, we have the equipment to precisely sort the required quantity in the required specification on film, gel or waffle pack with our LED chip sorters. - Long-term storage
In our dry storage cabinet we store LED chips professionally in gel- or waffle-pack for a longer period of time to support the project runtimes of our customers.
Frequently asked questions
The common abbreviation for laser diode is LD, usually referred to as EELs. EEL stands for "Edge Emitting Laser". Another type of semiconductor laser is the VCSEL. This stands for "Vertical-Cavity Surface-Emitting Laser". With this type of diode, the light is emitted perpendicular to the plane of the semiconductor chip. In contrast to the edge-emitting laser diode, where the light is emitted at one edge of the chip.
A laser diode driver may be required to operate laser diodes efficiently. This device supplies the required voltage for the diode at a defined current and also ensures a stable temperature. It is required for both continuous wave (CW) and pulsed operation. Although we do not offer drivers, such devices are equipped with integrated circuits and transistors that operate in TTL (transistor-transistor logic) mode. These circuits enable precise control of the laser diodes, ensuring accurate switching on and off.
Laser diodes can operate at many different wavelengths and power output levels and are useful in many applications, including laser technology, optical storage, optical communication and laser medicine. We offer solutions from 380 nm to 1000 nm, from UV, blue, green and red to infrared diodes.
TO stands for "through-hole", which means that the components are installed in a carrier material using holes or bores. TO housings are available in various sizes, designs and shapes. TO can is the most common form of laser diode. A nitrogen atmosphere prevails inside the TO. A sealed TO can is hermetically sealed, i.e. protected against the exchange of air or water.
Chips are the smallest design. They are usually mounted on a submount in a housing such as a TO and are available in a wide range of variants. They are small, light and take up little space, but they are more difficult to handle.
Bars are one of the most powerful types of enclosure. In principle, it is a series of chips. Even during processing, no individual chips are sawn out of the epi, but a corresponding number are left next to each other. Much higher outputs can be achieved with bars. Processing is demanding and must be carried out in a clean room atmosphere. Laser bars can be separated into individual laser chips.
SMD housings are larger than chips and can accommodate several components. SMD housings are normally mounted on a carrier material using solder paste. SMD packages are easy to assemble, robust and compact, but they require a special tool for soldering.
Plastic housings are often used for components that need to be housed in a small space. They are lighter than metal housings and offer more flexibility in the choice of shape. Plastic enclosures are a cost-effective choice and they are easy to assemble, but they are not as robust as metal enclosures.
Laser diodes are electronic components that generate laser radiation. They have a short wavelength, from 380 nm (UV) to >1000 nm (infrared). Laser diodes are used in many optical applications. The diverse applications of laser technology in various industries, for example, illustrate the importance of laser diodes as a light source:
- Medical applications: Laser diodes serve as important light sources in medicine in medical equipment, be it for skin treatments, hair removal, dentistry or surgical procedures.
- Communication: In telecommunications, laser diodes are indispensable for transmitting data via fiber optic cables.
- Material processing: In industry, laser diodes are used as laser sources for cutting, engraving and marking applications.
- Consumer electronics: Laser diodes can be found as laser sources in DVD and Blu-ray players, laser projectors and laser show systems.
- Research and development: In science, laser diodes play a crucial role in experiments and investigations in physics, chemistry and biology.