Advantest Q81211 1310 nm Fabry-Pérot Fiber Optic Light Source Module

Advantest Q81211 1310 nm Fabry-Pérot Fiber Optic Light Source Module

The Advantest Q81211 is a 1310 nm fiber optic light source module designed for professional optical testing and measurement applications. Using a Fabry-Pérot laser diode, the Q81211 provides a nominal optical output power of 0 dBm and a wavelength specification of 1310 nm ±20 nm. It is suitable for compatible laboratory, production, telecommunications, maintenance, and fiber optic test environments.

The Q81211 is frequently used as a plug-in optical source with compatible Advantest optical multimeter and optical measurement systems, including systems such as the Advantest Q8221. Its combination of adjustable optical attenuation, continuous-wave operation, multiple chopped modulation frequencies, and an FC/PC optical interface supports a range of fiber optic component and system testing workflows.

An integrated attenuator provides adjustment from 0 to 6.0 dB in 0.1 dB increments. This allows the optical level to be reduced in controlled steps for receiver evaluation, component testing, comparative measurements, and other applications requiring adjustable source output. The specified output stability of less than 0.01 dB per minute supports consistent measurements during compatible test procedures.

Features and Benefits of the Advantest Q81211

The Advantest Q81211 provides practical optical source capabilities for technicians, engineers, laboratory personnel, and organizations working with fiber optic components and compatible optical measurement equipment.

• 1310 nm operating wavelength: Provides optical output at a nominal wavelength of 1310 nm with a specified tolerance of ±20 nm.
• Fabry-Pérot laser diode: Uses an FP-LD optical source with a specified spectral width of less than 10 nm.
• 0 dBm nominal output power: Delivers a nominal optical output of 0 dBm, equivalent to 1 mW.
• Adjustable optical attenuation: Provides an attenuation range from 0 to 6.0 dB for controlled reduction of the optical output.
• Fine attenuation increments: Supports attenuation adjustment in 0.1 dB steps for precise test-level control.
• CW and chopped operation: Supports continuous-wave output and selectable 270 Hz, 2 kHz, and 4 kHz chopped modulation modes.
• Stable optical output: Features a specified stability of less than 0.01 dB per minute.
• FC/PC optical connector: Provides a standardized interface for compatible fiber optic cables, adapters, instruments, and test assemblies.
• Plug-in module configuration: Designed for use with compatible Advantest optical multimeter and optical measurement systems.

Adjustable Optical Output

The Advantest Q81211 includes an integrated optical attenuator with a range of 0 to 6.0 dB. Attenuation can be adjusted in 0.1 dB increments, enabling users to establish controlled optical test levels without adding a separate external attenuator for suitable applications.

This adjustable output is useful when evaluating the response of compatible optical receivers, components, detectors, and measurement instruments at different input levels. It can also support comparative measurements, system troubleshooting, component verification, and repeatable laboratory procedures where a controlled change in optical power is required.

CW and Chopped Modulation Modes

The Q81211 supports both continuous-wave and chopped optical output. Available chopped modulation frequencies include 270 Hz, 2 kHz, and 4 kHz. These selectable modes support compatibility with optical power meters and test systems that use modulated source identification or signal-detection functions.

Continuous-wave operation is suitable for general optical power measurements and applications requiring a steady source. Chopped operation can help compatible measurement equipment distinguish the test signal from background light or identify a source operating at a selected modulation frequency.

Optical Connectivity and System Compatibility

The Advantest Q81211 is fitted with an FC/PC optical connector. Before connecting the module, users should confirm that the patch cable, adapter, receiving instrument, and optical component use a compatible connector and fiber configuration. The maximum permitted optical input of every connected device should also be reviewed before operation.

Fiber connector end faces should be inspected and cleaned with suitable fiber optic inspection and cleaning equipment before connections are made. Proper connector care helps minimize contamination-related insertion loss, unstable readings, and potential damage to optical interfaces.

The exact compatibility of the Q81211 should be verified against the intended Advantest mainframe or optical multimeter. Users should confirm the system model, available plug-in slots, firmware requirements, operating controls, and module support before installation.

Typical Applications

The Advantest Q81211 is suitable for professional applications such as:

• 1310 nm fiber optic component testing
• Optical power meter testing and verification
• Fiber optic receiver evaluation
• Optical loss and transmission measurements
• Laboratory fiber optic experiments
• Telecommunications equipment testing
• Production and quality-control workflows
• Optical component research and development
• Maintenance of compatible Advantest optical test systems
• Replacement or spare plug-in light source requirements

Product Overview

Brand	Advantest
Model	Q81211
Product Category	Fiber Optic Light Source Module
Source Technology	Fabry-Pérot laser diode
Primary Application	1310 nm optical testing and measurement
Module Configuration	Plug-in optical source module
Suitable For	Fiber optic laboratories, telecommunications testing, production, research, maintenance, and compatible Advantest optical measurement systems

 

Specifications

Specification	Details
Wavelength	1310 nm ±20 nm
Spectral Width	Less than 10 nm
Optical Source Type	Fabry-Pérot laser diode (FP-LD)
Nominal Output Power	0 dBm ±1 dBm
Nominal Output in Milliwatts	1 mW
Attenuator Range	0 to 6.0 dB
Attenuator Resolution	0.1 dB steps
Output Stability	Less than 0.01 dB per minute
Operating Modes	Continuous wave and chopped modulation
Chopped Modulation Frequencies	270 Hz, 2 kHz, and 4 kHz
Optical Connector	FC/PC
System Compatibility	Compatible Advantest optical multimeter and optical measurement systems, including systems such as the Q8221

 

Comprehensive Functional and Performance Testing

When applicable, AssetRelay can perform comprehensive functional and performance testing before shipment. Available evaluation may include visual inspection, module recognition in a compatible system, confirmation of optical output, wavelength verification, optical power measurement, attenuation adjustment testing, output-stability evaluation, and checking of accessible CW and chopped modulation modes.

The exact testing scope depends on the product condition and the availability of a compatible Advantest mainframe, fiber optic test instruments, calibrated optical power meters, wavelength-measurement equipment, patch cables, adapters, and test fixtures. Buyers should review the listing condition, included accessories, connector configuration, and available test results before purchase.

Why Buy from AssetRelay?

AssetRelay supplies professional equipment and product solutions for fiber optic, telecom, laboratory, production, inspection, cleaning, RF/microwave, electronic test, and photonics applications. The Advantest Q81211 is listed to help engineers, technicians, procurement teams, laboratories, system integrators, and service organizations source practical optical test equipment for professional environments.

Before purchase, buyers should confirm the product condition, included accessories, optical connector, wavelength requirements, output-power requirements, and compatibility with the intended Advantest mainframe or optical measurement system.