NIREOS | GEMINI 2DINTERFEROMETER | USER TECHNICAL MANUAL 2.2-A
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1. Introduction
1.1 Brief Description
The GEMINI 2D is an ultra-stable interferometer, capable of generating two delayed and phase-locked
replicas of the input light. The relative delay T1between these two replicas can be controlled by the
user via software with extremely high reproducibility and phase stability (<1 attosecond, corresponding
to <λ/1000 in the visible spectral region). This delay is introduced by mechanically moving an optic with
a motorized positioner, whose position can be controlled via software. Its exceptional stability is made
possible thanks to the employed common-path geometry, that makes the device completely insensitive
to external noise and vibrations. During the scan of the delay T1, the absolute arrival time of one of the
two replicas is kept fixed. The GEMINI 2D Interferometer is thus the ideal device for generating a pair
of replicas (i.e. controlling the state of polarization) of the incoming light with interferometric stability.
The device works over a broad spectral range (from the Ultraviolet to the Mid-Infrared) and it is also
compatible with ultrashort few-optical-cycle pulses, making it perfectly suitable e.g. for generating a
pair of pump pulses in two-dimensional spectroscopy measurements.
1.2 Information, Warnings and Safety Instructions
1.2.1 Hazardous Voltage
The Controller Module can generate high output currents at high voltages. They may cause serious or
even lethal injury if used improperly. Therefore, the equipment should only be operated by personnel,
which is adequately trained and educated to prevent any improper use. Please follow general accident
prevention rules:
•Never touch any part that might be connected to an output with a high voltage.
•Do not connect products from other manufacturers to the output connectors.
•Never use equipment that is damaged in any way.
•The Controller Module contains no user serviceable parts. Never open the case. Procedures
which require opening the case must only be carried out by authorized, qualified and trained
personnel.
Output connectors with dangerous signals are labelled with the following symbol:
Figure 1
: "Caution, risk of electric shock" symbol.
