Precision Space Light Delay Line Optical Delay Line ODL is a device produced by Mesa Photonics that controls optical path changes through software to achieve spatial light delay. It has a wide range of applications in optical detection fields such as Terahertz Time Domain Spectroscopy (THzGTDS), Optical Coherence Tomography (OCT), and Ultra Fast Time Resolution Spectroscopy In a typical terahertz (THz) time-domain spectroscopy system, the ODL device achieves optical delay by driving a mirror on a micro displacement platform through a stepper motor. Due to the high reliability and low cost of micro displacement technology, this method is widely used. The price is affordable, but it combines high precision, high speed, optical stability, and functionality excellently. Very suitable for pump detection, autocorrelation measurement, and ultra short laser pulse measurement (interference and intensity methods). Advanced voice coil technology enables optical delay line ODLODL to have an accuracy of 150 nanometers. The bidirectional transmission optical path resolution is 1 femtosecond The response time is only 1ms, but it is very stable for DC. Our ODL interference with a range of 1 centimeter is very stable (tested using a 650nm laser) There is no mechanical backlash, no hysteresis effect, and no transmission wear of stepper motors, making it easy to use.

Precision spatial light delay lines can be controlled through digital signals, analog control, or a combination of both. The digital and analog control of positions allows them to be seamlessly integrated into various experiments, including pump probe experiments and autocorrelation measurements (interferometry and intensity measurement methods). Simulated data collection allows for monitoring of second harmonic or multiphoton fluorescence. Two 16 bit analog-to-digital converters simplify data acquisition. Data input and output allow for primary/secondary clock timing. Windows independent programs allow you to constantly monitor the running status. In fact, both systems can use VideoFROGscan to build their own extended and customized FROG systems. Optional plugins include a common path interferometer, which can be used as an autocorrelation instrument for microscopes.

Product Structure Diagram:

Technical parameters of precision space optical delay line ODL:

• Product size: 146 * 94 * 53mm
• Journey: 1cm
• Light height: 66.7mm
• Directional stability: Horizontal:<5mrad (upgradable to<0.05mrad)
• Vertical<1mrad (upgradable to<0.05mrad)
• Response time: 1ms
• Maximum speed: 40cm/s
• Accuracy: 150nm
• Short term repeatability: 200nm
• Long term repeatability: 50ppm
• Beam spacing: 15mm
• Incident aperture: 15mm
• Optional amplification gain: 1x, 10x, 100x, 1000x
• Input range: -2V to+2V
• Noise: 30uV@10x gain
• Step resolution: 150 nm (nominal 1 fs, dual channel)
• Activity range: 10mm
• Position nonlinearity:<0.5%
• Control loop bandwidth: 1 kHz
• Trigger: TTL input, valid high state
• Frame synchronization output: CMOS/TTL output, valid in high state
• Supporting software: LabView VI (2012 version) and applications for digital scanning and data acquisition

Optional accessories:

Central control retroreflector: composed of three mutually perpendicular mirrors, its characteristic is that regardless of which direction the incident light enters from, the retroreflector light is parallel to the incident light

Optical Delay Line - ODL Function Curve of Optical Delay Line:

The following figure shows the function curve of simulating sine wave frequency and light delay.

Intensity diagram of interference curve:

The intensity diagram of the interference curve in the following figure indirectly reflects the stability of ODL.