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MICRO-CONTROLE / Spectra-Physics
New Focus Electro-Optic Modulator Brochure

New Focus Electro-Optic Modulator Brochure

Product catalog summary

Introduction
Simply Better™ Photonics offers a range of electro-optic modulators known for their performance, quality, and ease of use. These modulators utilize the electro-optic or Pockels’ effect to alter the refractive index and phase of light through an applied electric field.

Specifications
The modulators are categorized into amplitude and phase modulators. Amplitude modulators operate from DC to 250 MHz, while phase modulators cover a range from DC to 9.2 GHz. They feature low drive voltages, low insertion losses, and high optical power limits. Materials used include lithium niobate (LiNbO3), magnesium-oxide-doped lithium niobate (MgO:LiNbO3), and KTP crystals.

Modulator Types

Phase Modulators: Used to vary the phase of an optical beam, generating frequency sidebands. They operate over a frequency range from DC to 9.2 GHz.
Amplitude Modulators: Create power fluctuations in signals, covering frequencies from DC to 250 MHz.
High Damage Threshold Modulators: Offer high optical-damage thresholds and cover frequencies from 10 kHz to 2.0 GHz.
High Efficiency Phase Modulators: Provide high modulation depth with frequencies from 0.5 to 2.0 GHz.

Broadband vs. Resonant Modulators
Broadband modulators can operate over a wide frequency range but require higher drive voltages. Resonant modulators are optimized for a single frequency, allowing for higher modulation depths with lower voltages.

Key Characteristics

Maximum Optical Intensity: The highest intensity a 1-mm beam can handle without damage.
Maximum RF Power: The recommended limit for RF drive power to avoid saturation or thermal issues.
Maximum Vπ: Voltage needed for a π phase shift, smaller for resonant devices.
Modulation Depth: Phase change per volt applied, larger for resonant modulators.
Frequency: The operational frequency range, with specific resonant frequencies available.
VSWR: Indicates impedance matching, with a value of 1 being ideal.
Wavelength: The range of the crystal’s anti-reflective coating.

Conclusion
Simply Better™ Photonics provides a comprehensive selection of modulators suitable for various applications, ensuring high performance and reliability.

Catalog excerpts

New Focus Electro-Optic Modulator Brochure-1

Electro-Optic Modulators Electro-Optic Modulator Family Scientists and engineers rely on our optical modulators for exceptional performance, quality, ease of use, broad selection, and excellent value. Simply Better™ Photonics

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New Focus Electro-Optic Modulator Brochure-2

Simply Better ™ Photonics New Focus Simply Better Photonics New Focus™ offers a broad line of optical modulators and drivers that are versatile, reliable and easy to use. All our optical modulators are based on the electro-optic or Pockels’ effect—the linear dependence of the index of refraction on an applied electric ﬁeld. Applying a voltage across the electrodes of an electro-optic crystal changes the effective refractive index and thus the phase of light as it passes through the crystal. Our amplitude modulators span the frequency range from DC to 250 MHz while our phase modulators span an...

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New Focus Electro-Optic Modulator Brochure-3

Tunable Diode Lasers Electro-Optic Modulator Selection Guide Standard Phase Modulators Phase modulators can generate frequency sidebands on Frequency range from DC to 9.2 GHz Resonant designs offer very low drive voltages Blue, Visible, and IR Wavelengths Modulator Series1 Wavelength Range Type Operating Frequency2 Modulation Depth Max Optical Intensity3 Material Standard Phase Modulators Note: All modulators are built with universal mounting options 1 More specifications available on the Newport website. Specifications are subject to change 2 Resonant modulators must be specified to a single...

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New Focus Electro-Optic Modulator Brochure-4

High Damage Threshold Phase Modulators Amplitude Modulators • High optical-damage thresholds—5x our LiNb03 versions • Covering frequency range from 10kHz to 2.0 GHz • Resonant designs with large modulation depths High Efficiency Phase Modulators • High efficiency (2x standard) for high modulation depth • Frequency range from 0.5 to 2.0 GHz • Blue, Visible and IR wavelengths • Used to create power fluctuations in signal • Covering frequency range from DC to 250 MHz • Can be used as electronically variable wave plates Broadband and Resonant Modulator Drivers • High-Voltage Amplifier for Driving...

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New Focus Electro-Optic Modulator Brochure-5

Simply Better ™ Photonics Phase Modulators Phase modulators are used to vary the phase of an optical beam. When driven sinusoidally, phase modulators can generate frequency sidebands on a cw optical beam. Sinusoidal phase modulation at a frequency Ω generates frequency sidebands at multiples of Ω about the central optical frequency. Given a sinusoidal phase modulation at frequency Ω and a peak phase modulation m, the phase variation is ø(t)=msin(Ωt). The electric ﬁeld of the optical beam after passing through the modulator can be seen below. Left: When a phase modulator is used, the laser beam...

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New Focus Electro-Optic Modulator Brochure-6

Tunable Diode Lasers Phase and Amplitude Modulator Definitions of Characteristics Maximum Optical Intensity The maximum optical intensity of a 1-mm-diameter beam that can be passed through the crystal without causing photorefractive damage. Note that this optical damage threshold is strongly wavelength dependent. Maximum RF Power The maximum recommended RF drive power. Above this power, the electronic components will saturate or thermal effects in the crystal (such as thermal lensing) will become a problem. Maximum Vπ The voltage required to achieve a π phase shift at a given wavelength. It is...

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