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EOM

The LiNbO3 intensity modulator is widely used in high-speed optical communication system, laser sensing and ROF systems because of well electro-optic performance. The R-AM series based on MZ push-pull structure and X-cut design, has stable physical and chemical characteristics, which can be applied both in laboratory experiments and ...

Specifications

Aperture Diameter: Not Specified
Peak Optical Power Density: Not Specified
Wavelength Range: 850 – 1550 nm
Transmission: Not Specified
Extinction Ratio: Not Specified
Rof-AMBox Electro-optical intensity modulator is a highly integrated product owned by Rofea with independent intellectual property rights. The instrument integrates electro-optical intensity modulator, microwave amplifier and its driving circuit into one, which not only facilitates the use of users, but also greatly improves the ...

Specifications

Aperture Diameter: Not Specified
Peak Optical Power Density: Not Specified
Wavelength Range: 1550 – 1550 nm
Transmission: Not Specified
Extinction Ratio: Not Specified
ROF-ModBox-SSB-1550 Suppression Carrier Single Sideband Modulation Unit is a highly integrated product of Rofea photoelectric with independent intellectual property rights. The product integrates Mach-Zehnder double parallel modulator, bias controller, RF driver And other necessary components into a unit, which doesn’t only ...

Specifications

Aperture Diameter: Not Specified
Peak Optical Power Density: Not Specified
Wavelength Range: 1550 – 1550 nm
Transmission: Not Specified
Extinction Ratio: Not Specified
The LiNbO3 phase modulator is widely used in high-speed optical communication system, laser sensing and ROF systems because of well electro-optic effect. The R-PM series based on Ti-diffused and APE technology, has stable physical and chemical characteristics, which can meet requirement of the most applications in laboratory ...

Specifications

Aperture Diameter: Not Specified
Peak Optical Power Density: Not Specified
Wavelength Range: 780 – 1550 nm
Transmission: Not Specified
Extinction Ratio: Not Specified
Phase modulator is a modulation device developed based on electro-optic effect and high frequency resonator theory, which can phase modulate polarized light. It is often used in precision optics systems such as laser interference, optical frequency combs, laser frequency stabilization, atomic cooling, and quantum state ...

Specifications

Aperture Diameter: 2 mm
Peak Optical Power Density: 1 MW/cm^2
Wavelength Range: 355 – 780 nm
Transmission: 97 %
Extinction Ratio: Not Specified
Pockels cell is a modulator about polarized light designed based on the Pockels effect. It is a key component in the laser cavity Q-switching, pulse selection and regenerative amplification system, and one of the best choices for intensity, phase and frequency modulation in laser processing and detection equipment.Moduoptik modified ...

Specifications

Aperture Diameter: 4 mm
Peak Optical Power Density: 1 MW/cm^2
Wavelength Range: 515 – 1064 nm
Transmission: 99 %
Extinction Ratio: >= 1000:1
DKDP Pockels CellsDKDP electro-optic Q-switches (Q-switch, Pockels Cells) are widely used in large-caliber, high-power, narrow-pulse (<1 Ons) laser systems due to their unique physical properties and excellent optical quality.The DKDP crystal is a uniaxial crystal with excellent optical quality with an extinction ratio of ...

Specifications

Aperture Diameter: 50 mm
Peak Optical Power Density: 700 MW/cm^2
Wavelength Range: 300 – 1100 nm
Transmission: 97 %
Extinction Ratio: >= 1000:1
KD*P (Potassium Dideuterium Phosphate) is the most widely used material for electro-optical applications due to its excellent E-O properties.  An electro-optic material such as KD*P can alter the polarization state of light passing through it, when an applied voltage induces birefringence change in the crystal. When used in ...

Specifications

Aperture Diameter: 3 mm
Peak Optical Power Density: 1000 MW/cm^2
Wavelength Range: 400 – 1200 nm
Transmission: 98 %
Extinction Ratio: >= 1000:1
RTP (Rubidium Titanyl Phosphate - RbTiOPO4) is a very desirable crystal material for electro­optic modulators and Q-switches. Due to its natural birefringence, It always works in pairs which are carefully matched to compensate the birefringence. The laser light propagates either in X-axis or Y-axis, and is polarized along the ...

Specifications

Aperture Diameter: 2 mm
Peak Optical Power Density: 600 MW/cm^2
Wavelength Range: 500 – 3000 nm
Transmission: 98.5 %
Extinction Ratio: >= 100:1

Electro-Optic Modulators (EOMs): Precision Light Control for Advanced Optical Systems

Electro-optic modulators (EOMs) are essential components in modern optical systems, enabling precise control over the amplitude, phase, frequency, and polarization of light. By utilizing the electro-optic effect, EOMs modulate light waves in response to an applied electric field, facilitating high-speed data transmission and advanced signal processing in various applications.

What Is an Electro-Optic Modulator?

An electro-optic modulator is an optical device that alters the properties of light passing through it by applying an external electric field to a nonlinear crystal, such as lithium niobate (LiNbO₃), potassium titanyl phosphate (KTP), or beta-barium borate (BBO). The electro-optic effect causes a change in the refractive index of the crystal, enabling modulation of the light's phase, amplitude, or polarization.

EOMs are typically categorized based on their modulation type:

  • Phase Modulators: Control the phase of light, commonly used in applications like laser frequency stabilization and quantum optics.

  • Amplitude Modulators: Adjust the intensity of light, essential for applications such as optical communication and signal processing.

  • Polarization Modulators: Alter the polarization state of light, utilized in various sensing and imaging systems.

How Do Electro-Optic Modulators Work?

The operation of an EOM relies on the electro-optic effect, where the refractive index of a nonlinear crystal changes in response to an applied electric field. This change in refractive index alters the phase, amplitude, or polarization of the transmitted light.

In a typical EOM setup, the nonlinear crystal is placed between two electrodes, forming a capacitor. When a voltage is applied across the electrodes, an electric field is generated within the crystal, modulating the properties of the passing light. The degree of modulation depends on factors such as the strength of the applied electric field, the length of the crystal, and the wavelength of the light.

Applications of Electro-Optic Modulators

EOMs are versatile devices employed in a wide range of applications:

  • Telecommunications: In fiber-optic communication systems, EOMs modulate light signals, enabling high-speed data transmission over long distances.

  • Laser Systems: EOMs are used in laser systems for applications like mode-locking, pulse shaping, and frequency stabilization.

  • Quantum Technologies: In quantum optics, EOMs facilitate precise control over photon states, essential for quantum computing and communication.

  • Sensing and Imaging: EOMs are utilized in various sensing and imaging systems, including interferometers and spectrometers, to modulate light properties for enhanced measurement capabilities.

Choosing the Right Electro-Optic Modulator

Selecting an appropriate EOM involves considering several factors:

  • Modulation Type: Determine whether phase, amplitude, or polarization modulation is required for the application.

  • Modulation Speed: Assess the required modulation bandwidth, which can range from kilohertz to gigahertz, depending on the application.

  • Crystal Material: Choose a nonlinear crystal with suitable electro-optic properties for the desired wavelength and modulation type.

  • Voltage Requirements: Consider the voltage requirements for the EOM, as higher voltages may necessitate specialized drivers.

  • Integration: Ensure compatibility with existing optical systems and ease of integration into the setup.

Explore Electro-Optic Modulators on FindLight

FindLight offers a comprehensive selection of electro-optic modulators from leading manufacturers, catering to various applications in telecommunications, laser systems, quantum technologies, and sensing. Our platform allows you to filter products based on key specifications, ensuring you find the perfect match for your needs.

Did You know?

The electro-optic effect is a result of the change in refractive index of a material when it is placed in DC or low-frequency electric field. Nonlinear optical materials with an incident static or low frequency electromagnetic wave will undergo modulation of refractive index and as such are often used as electro-optic modulators (EOM). In general, the modulation in refractive index in EOM may be induced on the amplitude, phase, frequency or polarization of the input beam. The most common EOM consists of a crystal whose refractive index depends on the strength of applied electric field. This implies if it is exposed to electric field, light will travel slower through it than in air. The phase of the light leaving the crystal can be controlled by changing the incident electric field as the phase delay is directly proportional to the time it takes for light to pass through the crystal.