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 repumper 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 DC coupled electro optic phase shifter has a usable bandwidth DC of 250MHz with a capacitive load of ~ 10 pF. It also includes floating electrodes for differential voltages and 2x SMA connectors (<500V) or HV feedthroughs with flying leads (< 5kV). The electro optic phase shifter also comes with a number of options such as temperature control, fiber coupling, wedged facets, Brewster angles, amplitude modulator and polarization modulator.
The main features of the DC coupled electro optic phase shifter are:
- Damped piezo-acoustic resonances
- Usable bandwidth DC - 250MHz
- Capacitive load ~ 10 pF
- 2x SMA connectors (<500V) or HV feedthroughs with flying leads (< 5kV)
- Vpi ~ 300V (at 1064nm)
- Different versions available for low, medium and high laser power and intensity
The applications of the DC coupled electro optic phase shifter are:
- Interferometer stabilization
- Dynamic optical lattices
- Intra-cavity feedback
Qubig DC Coupled Electro Optic Phase Shifter
Damped piezo-acoustic resonances
Usable bandwidth DC - 250MHz
2x SMA connectors (<500V) or HV feedthroughs with flying leads (< 5kV)
Different versions available for low, medium and high laser power and intensity