Product Introduction

High signal-to-noise ratio automatic balanced polarization detector is a disruptive product in the field of polarization related optical detection. Compared to similar products on the market, this module has been specially optimized for ultra short pulse width lasers (<1 picosecond). The two models of modules are respectively suitable for ultrafast pulse width lasers with repetition rates of 0.1 KHz – 5 KHz and 200 kHz – 200 MHz. As shown in the figure on the right, the module integrates a balance detector, Wollaston prism, and 1/4 glass slide (installed on an electric rotating table) inside. It is worth noting that when detecting short pulse laser beams, even if the light input power is very low, the detector will frequently saturate. Meanwhile, due to the sensitivity of the detection system to the angle of the quarter wave plate, the measurable window is often very small and unstable, which limits the linear response range of the detector. Our TTT-ABPD series automatic balanced polarization detection module has been specially optimized to address the above issues, and has excellent stability and ease of operation.

The high signal-to-noise ratio automatic balanced polarization detector system is suitable for the following (but not limited to) scenarios:
Magneto optical Kerr effect measurement system

Terahertz time-domain spectroscopy system

• Optical pumped terahertz detection system

Other scenes that require detection of optical polarization

Product Features

Automatic calibration function:High signal-to-noise ratio automatic balanced polarization detectorThe four piezoelectric motors built into the module will achieve automatic calibration of the system's optical path (direction and position). Based on the initial state, this automatic calibration process
It only takes tens of seconds to a few milliseconds.

Achromatic design: In response to the broadband characteristics of ultra short pulse lasers, this module is equipped with high-performance achromatic waveplates to compensate for phase delay.

We can provide a module version with manual adjustment of glass slides according to demand to reduce user costs. For the requirement of integrating the TTT-ABPD series into various systems, our company provides a complete NI LabView module control program.

Friendly reminder: This module also has excellent signal-to-noise ratio in continuous laser polarization detection, but its advantages compared to existing products in the market may not be as obvious in ultra short laser scenarios.

Product parameters

Working wavelength	From 340 to 1100 nanometers
Maximum beam diameter	5 millimeters
Electrical bandwidth	1k version: 20 kHz (optimal for 0.1 kHz-5 kHz laser) 200k version: 400 kHz (optimal for 200 kHz – 200 MHz lasers)
Electrical interface	SMA (Port A, Port B, Port A-B)
Conversion gain (A-B)	500 kV/A
slide	Achromatic glass slide (user selectable wavelength)
Motor rotation accuracy	0.03 degrees
Motor control interface	Micro USB
Power interface	Hirose 4 pin, 12±1 VDC 1A
Module configuration	1 achromatic glass slide, 1 electric rotary motor, 1 balance detector, and 1 Wollaston prism
System size1	74mm x 105mm x 110mm
be careful:1This size does not include the electrical connection line part

Actual testing comparison

Shanghai Yichi Optoelectronic Technology Co., Ltd