Electro Optics Systems & Products

Electro-optics operate by the propagation and interaction of light with various tailored materials. Vescent Photonics manufactures and supplies electro-optic systems and products including saturated absorption spectroscopy modules, heterodyne modules, beat note detectors, and fiber-coupling ports. Our electro-optic systems offer superior performance, exceptional reliability, the highest accuracy together with superior stability, damage resistance and durability.

Saturated Absorption Spectroscopy Electro Optic Module

In experimental atomic physics, saturated absorption spectroscopy or Doppler-free spectroscopy is a set-up that enables the precise determination of the transition frequency of an atom between its ground state and an optically excited state. Vescent manufactures the D2-210 saturated absorption spectroscopy electro-optic module which serves as a primary optical frequency standard based on the Doppler-free hyperfine spectra of various alkali metal vapers making locking to atomic transitions easier and more powerful than ever before. The unit works as a general-purpose frequency discriminator and can be charged with Potassium, Rubidium, or Cesium.

Completely redesigned to maximize performance in a number of laser-locking environments, the D2-210 makes atomic absorption-referenced frequency locks simple. Designed as a general-purpose frequency discriminator, it is compatible with our D2-125 Reconfigurable Servo as well as other feedback loop filters. The D2-210 can be charged with either Potassium, Rubidium, or Cesium. It is magnetically shielded and accepts laser powers from microwatts to over a hundred milliwatts.

Laser Heterodyne Electro-Optic Module

The Vescent D2-250 laser heterodyne electro-optic module conveniently overlaps two lasers to produce an optical beat note commonly used as an error signal for fixing the frequency of one laser relative to a second laser. Kinematic adjustment mounts make it easier and faster than ever to co-align both lasers. The use of rotatable waveplates at the inputs and polarizing beam splitters allows adjustment of pick off a percentage for accepting a large range of powers.

Beat Note Detector

The Vescent D2-260 beat note detector converts the optical beat note captured by the D2-250 heterodyne module to an electrical signal in the microwave domain. This error signal is processed by the D2-135 Offset Phase Lock Servo which, by way of feedback control to the slave laser, establishes a true phase lock between the master and slave lasers. The Vescent Photonics D2-260 high-speed detector has a full 9 GHz bandwidth for capturing beat notes between lasers of different frequencies. In combination with our other modules, a true phase lock between a pair of lasers, with a user-defined, high-precision frequency offset, can be established.

Fiber-Coupling Port

The Vescent D2-120 Fiber-Coupling Port is designed to facilitate coupling of a laser beam into either a single or multimode optical fiber. This module incorporates a 35 dB optical isolator, prior to the fiber facet, to reduce optical feedback. An FC fiber receptacle is provided with an aspheric AR-coated condensing lens and six degrees of freedom for alignment optimization: 3 linear (x, y, z), 2 angular (azimuth, elevation), and 1 rotational (for PM fibers).

Optical Isolation Module

The D2-130 optical isolator module contains a 30 dB isolator and 1/2-waveplate in a rugged and compact package. The D2-130 can be used whenever extra isolation is desired, such as added isolation prior to fiber coupling.