High Efficiency Electro Optic Modulator from Qubig

Electro-optic modulators (EOMs) are an easy to use and efficient tool to externally modify the phase, frequency, polarization, or amplitude of a free-space laser.

In contrast to acousto-optic modulators, the spatial mode of the laser beam remains unaltered. So EOMs are an ideal choice when several frequency components are required in the laser spectrum. For instance in pumper frequency generation in laser cooling and quantum optics, spectral broadening to minimize stimulated Brillouin scattering (SBS) in high power fibers, and for frequency modulation (FM) techniques, like FM Spectroscopy, Modulation Transfer Spectroscopy or Pound-Drever Hall (PDH) Laser Frequency Stabilization. The modulation spectrum of Qubig’s electro-optic modulators ranges from DC-coupled phase shifters to high-Q, resonant EOMs in the MHz to GHz.

Qubig’s high-efficiency electro-optic modulator has a custom resonance frequency (f0) ranging from 0.1MHz up to < 100MHz and a 50 Ohm input with VSWR of less than 1:1.2. Other features include damped out piezo/acoustic resonances, low residual amplitude modulation (RAM), usable bandwidth ~ 1% of f0 (manual tuning available), and large aperture for easy alignment. The EOM offers efficient modulation and is optimized for free-space lasers. It is available with a number of options such as temperature control, fiber coupling, wedged facets, Brewster angles, amplitude modulator, and polarization modulator.

Key Features

The main features of the high-efficiency electro-optic modulator are:

Usable bandwidth ~ 1% of f0 (manual tuning available)

Custom resonance frequency from 0.1MHz to < 100MHz

50 Ohm input, VSWR < 1:1.2

Damped out piezo/acoustic resonances

Low residual amplitude modulation (RAM)

Any orientation for s- or p-polarization

Max. RF power: 2W (10W with thermal mount)

Large aperture for easy alignment

Standard post mounting (M4 or #8-32)

Dedicated versions available for low, medium and high laser power/intensity

Applications

The applications of the high-efficiency electro-optic modulator are:

Modulation Transfer Spectroscopy

Frequency Modulation Spectroscopy

Laser Frequency Stabilization

Pound-Drever Hall locking

Dynamic optical lattices

Spectral broadening to increase MOT capture velocity

High Efficiency Electro Optic Modulator from Qubig

Custom resonance frequency from 0.1MHz to < 100MHzLow residual amplitude modulation (RAM)Large aperture for easy alignmentAny orientation for s- or p-polarizationDedicated versions available for low, medium and high laser power/intensity