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INSTRUMENTS / LIGHT SOURCES
Lasers are coherent light sources. It is highly directional, monochromatic (single color), and coherent beam of light, meaning the waves are in phase with each other. This unique combination of properties makes them indispensable for a wide array of applications.
Properties:
High Coherence: Laser light has a stable, predictable phase relationship, which allows for precise interference and diffraction patterns.
Monochromaticity: Lasers emit light within a very narrow range of wavelengths.
Directionality: The beam is highly collimated and doesn’t spread out much over long distances.
High Power Density: The energy is concentrated into a small area.
Examples and Applications:
Diode Lasers: Compact and efficient, used in everything from barcode scanners and laser pointers to fiber-optic communications and medical procedures.
Solid-State Lasers: These use a solid gain medium (e.g., ruby, neodymium-doped YAG crystal) and are often used for high-power applications like material processing (cutting, welding) and scientific research.
Gas Lasers: Use a gas or a gas mixture as the gain medium (e.g., argon, helium-neon).
Incoherent sources emit light with no fixed phase relationship between the waves. The light waves are emitted in random directions and at different times. These sources are known for their broad spectral output and are used when a wide range of wavelengths is needed.
Examples and Applications:
Tungsten-Halogen Lamps: These incandescent lamps use a tungsten filament heated to high temperatures. They provide a continuous spectrum in the visible and near-IR range, required when a broad spectrum is needed for sample illumination.
Xenon Arc Lamps: Known for their intense, broad-spectrum output that closely resembles sunlight.
Deuterium Lamps: Specifically designed for applications in the UV range.
Light-Emitting Diodes (LEDs): These semiconductor devices are highly energy-efficient and durable.
P-DFB Series / PLS Series
DFB (Distributed Feedback) Laser Diodes and FP (Fabry-Perot) Laser Diodes are two fundamental types of semiconductor lasers. The key difference lies in how they achieve optical feedback and mode selection.
The Fabry-Perot (FP) laser diode is the most common and structurally simplest semiconductor laser.
Key Characteristics and Applications:
– Relatively wide spectral width (multi-mode operation).
– Lower coherence length.
– Poor wavelength stability; prone to mode hopping.
– Low cost and simple to manufacture.
Typical Applications include Short-distance fiber optic communications, low-speed data links, optical storage.
The Distributed Feedback (DFB) laser diode is an advanced design engineered for superior spectral purity and stability.
Key Characteristics and Applications:
– Extremely narrow spectral width.
– High coherence length.
– Excellent wavelength stability and can be finely tuned.
– Higher cost due to internal grating precision.
Typical Applications include High-speed, long-distance optical telecommunications DWDM, LiDAR etc.
P-ASE Series
An Amplified Spontaneous Emission (ASE) light source is a broadband, high-power source that works by amplifying the naturally occurring spontaneous emission within a gain medium. Unlike a laser, which uses an optical resonator (mirrors) to provide feedback and select a single wavelength, an ASE source amplifies light without a resonant cavity. This results in a continuous, broad spectrum of light
Photonik’s broadband ASE light sources are widely used in optical fiber gyro or fiber sensor systems, fiber grating or DWDM filter testing, R&D environment or education use, testing environment for passive fiber optic components and equipment manufacturers.
Features Wide Spectral Width, Low Temporal Coherence, High Spatial Coherence, High Power and Brightness
LUMI Series
LUMI series fiber optic illuminators are based on halogen and LED sources built-in for high brightness from fiber output.
Compact in design, these light sources feature a quartz-halogen lamp producing an intense, cool white light at 3350 Kelvin. The Model LUMI-150 is quiet with minimum vibration, and offers full range dimming control for proper intensity adjustments. Other features include fan cooling for optimum bulb life (200 hours nominal), a quick disconnect for ease in light guide adapter conversions, and easy access to lamp replacement.
HLS Series / HTLS Series
The Handheld Red Light Source (HLS) is an ideal tool for identifying broken or bent patch cord, especially for fiber identification during ribbon or bunched optic fiber pigtail installation, in which identification work for fiber from end to end may cause very troubles or time-consuming. The Handheld Red Light Source emits a continuous or blinking bright red light at the fault location, which is easily visible through the fiber jacket, for either single mode or multimode fiber cables.
Handheld Telecom Light Source (HTLS) may provide the output with 1 to 4 wavelengths according to the specific requirements including the 650nm red source,1310/1550nm wavelength for the single mode fiber and 850/1300nm wavelength for the multimode fiber or other wavelengths according to customer needs. Together with optical power meter, it acts as a perfect solution for the fiber optic network work.