With the accelerated deployment of 5G networks and the surging demand for optical interconnection in data centers, 

Dimension Technology's programmable optical attenuators have two major forms: OMEGA series modular and XHASIS series 

rack-mount, with significant advantages such as low insertion loss, high attenuation rate, high density, low cost, customizability, 

and easy deployment. Its application scenarios have extended from traditional laboratory testing to multiple fields such as 

optical network automated operation and maintenance, optical fiber sensing, and laser equipment control.

Main Adwantages

• Multimode EF (Encircled Flux) control, compliant with various source testing standards
• Lower insertion loss, with attenuation rate increased by 200%
• Built-in power monitoring with closed-loop monitoring, supporting three control modes
• Supports custom task settings and programming
• OMEGA series modular can integrate multiple functional modules into one for one-stop testing of optical devices
• XHASIS series rack-mount has high density, compact size, easy deployment and low cost.

Main Applications

• 8OOG optical module testing
• Optical path loss simulation
• Optical device BER and receiving sensitivity testing
• EDFA manufacturing and inspection
• Photodetector linearity test
• Tunable source power test

Main Categories

OMEGA Series Modular
• Mechanical Optical Attenuator
• MEMS Optical Attenuator

XHASIS Series Rack-Mount
• Mechanical Optical Attenuator
• MEMS Optical Attenuator

OMEGA Series Modular vs XHASIS Series Rack-Mount

Strict Control of Multimode EF (Encircled Flux) for Light Source Compatibility

Different multimode lasers exhibit varying EF during fiber transmission, leading to calibration errors if unaccounted. Dimension Technology’s multimode attenuators utilize mode controllers and EF detection equipment to strictly comply with IEC-61280-1-4 and TIA-455-203 standards, ensuring good test accuracy under different light sources.

Test results after optimization: Full range attenuation linearity ±0.10dB

Ultra-low insertion loss and ultra-fast decay

• Insertion loss optimization: Through optical path structure optimization, insertion loss SM<1.0dB, MM <1.5dB . 

• Attenuation speed increased: Mechanical attenuator speed increased from 25dB/s to 50dB/s, full-scale attenuation is 1.2s; MEMS attenuator increased from 1000dB/s to 2000dB/s , full-scale attenuation is 0.2s. The testing efficiency is greatly improved.

Built-in power monitoring closed-loop monitoring, three modes to control attenuation

• Power monitoring function: Add built-in optical power meter components at the input and output ends of the attenuation optical path, adjust the attenuation value with real-time feedback, and improve the attenuation accuracy to ±0.10dB .

Three control modes: Support multiple control modes to meet the needs of different application scenarios.

Power Monitor Mode	Power Feedback Mode	Attenuation Mode
Real-time display of the current output power of the attenuator,making it convenient for users to detect the power intensity of the optical signa duringinstantaneous changes.	Set the attenuation according to the preset expected power value, and adjust it based on the feedback from the built-in power meter reading to ensure accurate output power.	Directly adiust the attenuation value.

Supports custom task settings and programming

• Multiple communication methods: OMEGA v1.O modular and XHASIS rack-mount optical attenuators provide TCP/IP or USB connection methods,

while OMEGA v2.0 modular is further optimized to support LXI communication.

• Visual testing: Equipped with visualization software, it is convenient for users to use, supports user-defined tasks, and quickly builds a test platform.
• Automated testing: Provides API interfaces and control instructions that encapsulate LabVIEW statements to facilitate users to quickly embed into 

the test system.

Main Application Scenarios

Optical module BER and receiving sensitivity test

The tunable attenuator plays a key role in the BER test and receiving sensitivity test of the optical module.

It simulates different channel conditions by precisely controlling the input optical power to evaluate the performance limit and stability of the optical module.

EDFA manufacturing and inspection

During the manufacturing and inspection process, it is necessary to accurately and dynamically adjust the input optical power to simulate different 

network scenarios (such as long-distance transmission and multi-wavelength multiplexing) to ensure the reliability, stability and consistency of the EDFA.

Photodetector linearity test

By adjusting the tunable attenuator and precisely controlling the input optical power, it is verified whether the electrical signal response of the detector 

under different light intensities maintains a linear relationship, thereby evaluating its linearity index.

Tunable light source power test

In the tunable light source power test, the stability of the output power of the tunable light source under different conditions can be verified by accurately 

adjusting the tunable attenuator, and the power flatness of the tunable light source at different wavelengths can also be tested .