FILTER PRODUCTS

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FILTER PRODUCTS

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Fiber Amplifiers

The Connet MFAP-1550-M-SF is a high-performance 1.5 µm CW single frequency polarization maintaining fiber amplifier, engineered for applications that demand precise signal fidelity and robust power output. Designed to amplify narrow-linewidth signals down to the kilohertz level, this module delivers up to 10W of output power ...

Specifications

Amplifier Type: N/A
Wavelength Range: 1540 – 1565 nm
Min Input Power: Not Specified
Max Output Power: Not Specified
Nominal Gain: Not Specified
Fiber Raman amplifier uses the Raman effect in quartz fiber to provide gain to optical signals, and achieves high gain and low noise amplification of optical signals in the C or L band, which can effectively compensate for the attenuation of optical signals in long-distance optical fiber transmission. It can be used in long-distance ...

Specifications

Amplifier Type: Raman Amplifier
Wavelength Range: 1528 – 1650 nm
Min Input Power: Not Specified
Max Output Power: Not Specified
Nominal Gain: 14 dB
The Erbium-Doped Fiber Booster Amplifier for L-band by DK Photonics is engineered to provide high-performance optical amplification within the L-band wavelength range of 1570–1603 nm. Utilizing advanced erbium-doped fiber technology, this amplifier delivers substantial output power with minimal noise, ensuring signal integrity. ...

Specifications

Amplifier Type: EDFA - Erbium-Doped Fiber Amplifier
Wavelength Range: 1570 – 1603 nm
Min Input Power: Not Specified
Max Output Power: 25 dBm
Nominal Gain: 0.3 dB
The Gain Flattened Erbium-Doped Fiber Amplifier (EDFA) for C-band is engineered to provide consistent optical amplification across the 1530–1565 nm wavelength range. Designed for high-performance fiber optic communication systems, this amplifier ensures uniform gain across multiple channels, maintaining a gain flatness of ...

Specifications

Amplifier Type: EDFA - Erbium-Doped Fiber Amplifier
Wavelength Range: 1530 – 1560 nm
Min Input Power: Not Specified
Max Output Power: 23 dBm
Nominal Gain: 25 dB
The Polarization Maintaining Erbium-Doped Fiber Amplifier (EDFA-PM) is engineered for applications requiring high polarization extinction ratio and stable performance in the C-band (1530–1565 nm). Designed to amplify optical signals while preserving polarization, it is ideal for fiber communication systems, fiber lasers, and ...

Specifications

Amplifier Type: EDFA - Erbium-Doped Fiber Amplifier
Wavelength Range: 1530 – 1565 nm
Min Input Power: Not Specified
Max Output Power: 14 dBm
Nominal Gain: 5 dB
High Power Polarization Maintaining Erbium-Doped Fiber Amplifier (PM-EDFA) for C-band is designed to provide high-performance optical amplification within the 1530–1565 nm wavelength range. Leveraging a multi-stage amplification architecture and advanced thermal management techniques, this amplifier delivers substantial output ...

Specifications

Amplifier Type: EDFA - Erbium-Doped Fiber Amplifier
Wavelength Range: 1540 – 1565 nm
Min Input Power: Not Specified
Max Output Power: 40 dBm
Nominal Gain: 3 dB
The High Power Polarization Maintaining Erbium-Doped Fiber Amplifier (PM-EDFA) for L-band is engineered to deliver robust optical amplification within the 1570–1605 nm wavelength range. Utilizing a unique multi-stage optical amplification design and reliable high-power laser heat dissipation technology, it achieves high power ...

Specifications

Amplifier Type: EDFA - Erbium-Doped Fiber Amplifier
Wavelength Range: 1570 – 1605 nm
Min Input Power: Not Specified
Max Output Power: 37 dBm
Nominal Gain: 3 dB
The High Power Single-Mode Erbium-Doped Fiber Amplifier (EYDFA-HP) is engineered to deliver robust optical amplification within the 1540–1565 nm wavelength range. Utilizing a unique multi-stage optical amplification design and reliable high-power laser heat dissipation technology, it achieves high-power output with low noise ...

Specifications

Amplifier Type: EDFA - Erbium-Doped Fiber Amplifier
Wavelength Range: 1540 – 1565 nm
Min Input Power: Not Specified
Max Output Power: 40 dBm
Nominal Gain: 3 dB
The High Power Single-Mode Erbium-Doped Fiber Amplifier for L-band is engineered to deliver robust optical amplification within the 1570–1605 nm wavelength range. Utilizing a unique multi-stage optical amplification design and reliable high-power laser heat dissipation technology, it achieves high-power output with low noise ...

Specifications

Amplifier Type: EDFA - Erbium-Doped Fiber Amplifier
Wavelength Range: 1570 – 1605 nm
Min Input Power: Not Specified
Max Output Power: 37 dBm
Nominal Gain: 3 dB
Hybrid Module of EDFA and Raman Amplifier module integrates the erbium-doped fiber amplifier and the first-order Raman fiber amplifier pump. Compared with traditional EDFA and Raman amplification systems, the use of this module can significantly reduce system complexity, improve reliability, and reduce volume. It is suitable for high ...

Specifications

Amplifier Type: EDFA - Erbium-Doped Fiber Amplifier
Wavelength Range: 1530 – 1565 nm
Min Input Power: Not Specified
Max Output Power: 23 dBm
Nominal Gain: 3 dB
Pulsed Erbium-Doped Fiber Amplifier for C-band is engineered to amplify picosecond and nanosecond laser pulses within the 1530–1565 nm wavelength range. Designed for input pulse peaks ranging from 1 to 10 mW, it delivers output peak powers up to 1000 W, making it ideal for applications requiring high peak power with minimal ...

Specifications

Amplifier Type: EDFA - Erbium-Doped Fiber Amplifier
Wavelength Range: 1530 – 1565 nm
Min Input Power: Not Specified
Max Output Power: 60 dBm
Nominal Gain: 3 dB
Single Channel Erbium-Doped Fiber Booster Amplifier for C-band is engineered to amplify optical signals within the 1530–1565 nm wavelength range. Designed for input powers ranging from -6 dBm to +3 dBm, it delivers saturated output powers up to 26 dBm, making it ideal for boosting laser emission power in various ...

Specifications

Amplifier Type: EDFA - Erbium-Doped Fiber Amplifier
Wavelength Range: 1530 – 1565 nm
Min Input Power: Not Specified
Max Output Power: 26 dBm
Nominal Gain: 3 dB
MARS series high power single frequency polarization maintaining fiber amplifiers by Connet are designed specifically for ultra-narrow linewidth single frequency laser sources, such as fiber lasers based on the principle of Distributed Feedback Bragg Grating (DFB) or Distributed Bragg Reflector (DBR).    This kind of a ...

Specifications

Amplifier Type: TDFA - Thulium-Doped Fiber Amplifier
Wavelength Range: 1900 – 2100 nm
Min Input Power: Not Specified
Max Output Power: 47 dBm
Nominal Gain: Not Specified
The HPOA-1.5 is a high power fiber optic amplifier from Bktel capable of producing up to 5W of output power between 1540 nm to 1565nm. This series of fiber amplifiers comes available in a standard rack-mount configuration, with input and output ports terminated with your choice of industry standard connectors including SC/APC and ...

Specifications

Amplifier Type: Not Specified
Wavelength Range: 1540 – 1565 nm
Min Input Power: -10 dBm
Max Output Power: 37 dBm
Nominal Gain: 5 dB
The Connet 1.5um CW Single Frequency Polarization Maintaining Fiber Amplifier Module is designed for single-frequency narrow-linewidth optical signal amplification. With a narrow linewidth down to kHz, this optimized multi-stage fiber amplifier effectively suppresses nonlinear effects, such as Brillouin scattering (SBS), while ...

Specifications

Amplifier Type: EDFA - Erbium-Doped Fiber Amplifier
Wavelength Range: 1540 – 1565 nm
Min Input Power: Not Specified
Max Output Power: Not Specified
Nominal Gain: Not Specified
The CoLIA 1550nm long pulse single frequency polarization maintaining fiber amplifiers of Connet are designed for long pulse (100ns-2us) applications. This modularized fiber amplifier is an eye-safe wavelength amplifier, and the maximum pulse energy can be up to 120uJ. It is suitable for amplifying the single frequency ...

Specifications

Amplifier Type: EDFA - Erbium-Doped Fiber Amplifier
Wavelength Range: 1530 – 1561 nm
Min Input Power: Not Specified
Max Output Power: 600 dBm
Nominal Gain: Not Specified
The Connet CoLIS-LP series 1550nm nanosecond long pulse single-frequency polarization-maintaining fiber laser is a modularized pulsed fiber laser designed for short-distance coherent Doppler wind lidar applications. Operating at an eye-safe wavelength, this laser delivers single-mode linear polarization and offers high single-pulse ...

Specifications

Amplifier Type: EDFA - Erbium-Doped Fiber Amplifier
Wavelength Range: 1545 – 1565 nm
Min Input Power: Not Specified
Max Output Power: 50 dBm
Nominal Gain: Not Specified
MARS series high power single frequency polarization maintaining fiber amplifiers by Connet are designed specifically for ultra-narrow linewidth single frequency laser sources, such as the fiber lasers based on the principle of Distributed Feedback Bragg Grating (DFB) or Distributed Bragg Reflector (DBR).  This kind of a fiber ...

Specifications

Amplifier Type: YDFA - Ytterbium-Doped Fiber Amplifier
Wavelength Range: 1040 – 1090 nm
Min Input Power: Not Specified
Max Output Power: 47 dBm
Nominal Gain: Not Specified
Connet MARS Series High-power Single Frequency Polarization Maintaining Fiber Amplifier is a power amplifier specially designed for ultra-narrow linewidth and single-frequency signal light (such as fiber laser based on DFB and DBR principle). The amplifier is capable of amplifying low-power optical signals in kHz level up to 50W ...

Specifications

Amplifier Type: N/A
Wavelength Range: 1900 – 2050 nm
Min Input Power: Not Specified
Max Output Power: Not Specified
Nominal Gain: Not Specified
Rof-SOA butterfly semiconductor optical amplifier (SOA) is mainly used for 1550nm wavelength optical amplification, using sealed inorganic butterfly device packaging technology, the whole process of domestic autonomous control, with high gain, low power consumption, low polarization related loss, high extinction ratio and other ...

Specifications

Amplifier Type: SOA - Semiconductor Optical Amplifier
Wavelength Range: 1490 – 1590 nm
Min Input Power: 12 dBm
Max Output Power: 12 dBm
Nominal Gain: 25 dB

Frequently Asked Questions

In their simplest form, fiber amplifiers are made of a pump source (typically a fiber-coupled diode laser) and a doped optical fiber which is the gain medium. Fiber amplifiers are often thought of as lasers without the laser cavity or feedback.

The light injected from a pump source into the fiber amplifier passes through the doped fiber medium. The injected light induces stimulated emission in the doped glass fiber causing the generation of additional coherent photons. Given the unique geometry of the amplifier characteristics with small diameter and large lengths, they exhibit significant conversion efficiencies often reaching 40GB in amplification gain.

Despite their unique optical cavity offering clean amplification, fiber amplifier also can exhibit optical noise in the amplified signal. This is often related to the injected seed. Small fluctuation and imperfections in the pump source can get amplified and become more noticeable in the amplified signal. Spontaneous emission that is always present in the gain medium along with the stimulated emission can also add to the optical noise.

The main two types of fiber optical amplifiers are the fiber Raman amplifier and the Erbium-doped fiber amplifier (EDFA). Raman fiber amplifiers take advantage of Raman scattering in optical fibers to produce stimulated emission while Erbium-doped fiber amplifiers rely on the emission produced by the ion dopants in the core of the optical fiber.

Erbium-doped fiber amplifiers are widely used in long-haul optical communications. Their output wavelength at 1.5um conveniently matches the transmission peak for most optical fibers used in telecommunication applications. Their output wavelength and clean output beam profile, ensures that the optical signal does not decay and thus information is not lost due to the long propagation distances.

The polarization of input can witness changes after propagation through an optical fiber due to birefringence. Therefore, the polarization state is not necessarily maintained by an optical amplifier.

Yes, optical amplifiers can amplify the signal of pulsed lasers as well as CW lasers.

Fiber Amplifiers: Enabling High-Power and High-Fidelity Light Transmission

In the world of photonics, fiber amplifiers have emerged as a transformative technology—combining scalability, efficiency, and beam quality in a single compact package. Originally designed to meet the demands of optical telecommunications, fiber amplifiers have since expanded into fields like manufacturing, medicine, and scientific research, thanks to their ability to deliver amplified light with minimal distortion and outstanding reliability.

What Is a Fiber Amplifier?

A fiber amplifier is a device that boosts the intensity of an optical signal directly within an optical fiber doped with rare-earth elements like erbium (EDFA), ytterbium (YDFA), or thulium (TDFA). Unlike traditional amplifiers that require optical-to-electrical and back-to-optical conversion, fiber amplifiers amplify light all-optically, making them faster, more efficient, and less prone to noise.

The doped fiber acts as a gain medium. When pumped with an external light source—often a laser diode—the rare-earth ions become excited and transfer energy to the incoming signal, increasing its intensity without changing its wavelength or phase properties.

Types of Fiber Amplifiers

  1. Erbium-Doped Fiber Amplifier (EDFA)
    Most commonly used in long-haul fiber optic communication due to its operation in the 1550 nm range, where silica fiber exhibits minimal loss.

  2. Ytterbium-Doped Fiber Amplifier (YDFA)
    Operates around 1030–1100 nm and is widely used in high power fiber amplifiers for materials processing and laser cutting.

  3. Thulium-Doped Fiber Amplifier (TDFA)
    Extends amplification into the 1900–2100 nm region, ideal for mid-IR applications, gas sensing, and some medical treatments.

Key Advantages

  • Compact and Lightweight: Fiber-based architecture allows for space-saving designs.

  • Excellent Beam Quality: Maintains single-mode output even at high powers.

  • Thermal Efficiency: Large surface-to-volume ratio in fibers enables natural heat dissipation.

  • Scalability: Easily increased power levels by adjusting fiber length and pump configurations.

  • All-Fiber Design: Eliminates alignment issues common in bulk optics.

Applications of Fiber Amplifiers

  1. Telecommunications
    Fiber amplifiers are essential in long-distance optical networks, allowing signals to travel thousands of kilometers without regeneration.

  2. Industrial Laser Systems
    High power fiber amplifiers serve as gain stages in fiber lasers for metal cutting, welding, and engraving.

  3. LIDAR and Remote Sensing
    High peak power amplifiers improve range and resolution in environmental monitoring and autonomous vehicles.

  4. Medical and Biomedical
    Used in surgical lasers and diagnostic tools where precision and safety are critical.

  5. Scientific Research
    Amplifiers support spectroscopy, atomic clocks, and quantum optics by delivering stable, high-fidelity light sources.

Fiber Amplifiers in the Future

As industries demand more compact, robust, and energy-efficient laser systems, optical fiber amplifiers will remain at the forefront of laser technology. Advancements in double-clad fiber structures, fiber Bragg gratings for wavelength control, and ultra-narrow linewidth designs continue to push performance boundaries.

New applications in quantum communication, space-based optics, and AI-integrated photonics will further elevate the role of fiber amplifiers—making them not just a supporting technology but a driving force in the next wave of innovation.

Did You know?

Fiber amplifiers are the backbone of modern optical communication and high-power laser systems. By directly amplifying light signals within a doped optical fiber, these devices offer a compact, energy-efficient solution for boosting signal strength without the need to convert light into electrical signals and back again. One of the most well-known types is the Erbium-Doped Fiber Amplifier (EDFA), which operates in the C-band around 1550 nm—ideal for telecom networks due to its low transmission loss in silica fibers. But fiber amplifiers go far beyond telecommunications. High power fiber amplifiers using ytterbium or thulium doping now power industrial material processing, LIDAR systems, medical diagnostics, and even scientific research like laser cooling and atom trapping. The advantages of fiber amplifiers are numerous: They are compact, scalable, and highly efficient thanks to excellent thermal dissipation in the fiber geometry. The waveguide structure of optical fibers ensures excellent beam quality even at high output powers. And since the amplification medium is a flexible fiber, systems can be easily integrated into portable and space-saving configurations. As demand for faster data, cleaner energy, and more precise industrial tools grows, fiber amplifiers play a crucial enabling role—providing the muscle behind high-power lasers and the finesse required for coherent signal boosting in photonic circuits. Whether you're enhancing a telecommunications link or building a high-energy laser system, fiber amplifiers offer the versatility, reliability, and performance today's technologies demand.