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26.5 GHz Multimode Lightwave Component Analyzer

Data Sheets

General Information

The Keysight Technologies, Inc. N4376D Lightwave Component Analyzer (LCA) is the instrument of choice to test short wavelength 10G Ethernet, Fibre Channel FCx8, FCx10 and FCx16 electro-optical components, with up to 26.5 GHz modulation range. The N4376D also supports the test of transmit­ter and receivers for optical computer backplanes and optical chip-to-chip connections in high speed computers and server applications.

Modern optical transmission and datacom systems require fast, accurate and repeatable charac­terization of the core electro-optical components. These core subcomponents (lasers, modulators and detectors) have significant impact on the performance of the transmitter and the receiver with respect to modulation bandwidth, jitter, gain, and distortion of the final transceiver.

For frequency dependent responsivity measurements the N4376D extends opto-electronic S-parameter measurements to multimode devices in the 850 nm wavelength range.

With the latest PNA family of network analyzers, the N4376D guarantees excellent electro-optical measurement performance. In addition a unique new calibration concept significantly reduces time from powering up the LCA until the first calibrated measurement can be made. This increases productivity in R&D and on the manufacturing floor.

The fully integrated “turnkey” solution reduces time to market, compared to the time-consuming development of a self-made setup.

The electrical and optical design of the N4376D is optimized for lowest noise and ripple. IIn addition, this design makes the accuracy independent of the electrical reflextion coefficient. It’s the excellent accuracy that improves the yield from tests performed with the N4376D, by narrowing margins needed to pass the tested devices. Traceability ensures world-wide comparability of test results.

The advanced optical design together with temperature-stabilized transmitter and receiver ensures repeatable measurements over days without recalibration.

Using the advanced measurement capabilities of the network analyzer, all S-parameter related characteristics of the device under test, like responsivity, ripple and 3 dB-cutoff frequency, can be qualified with the new N4376D Lightwave Component Analyzer from 10 MHz to 26.5 GHz.

The network analyzer

The N4376D is based on the new 2- and 4-port N5222A PNA Series microwave network analyzer with an identical and well known user interface across all Keysight network analyzers. Versions with configurable test set and bias-T integrated in the network analyzer are available. The High RF output power ensures a higher optical modulation index (OMI). This gives you the freedom to change between small signal analysis and large signal analysis of your device under test. True mode

balanced measurements are possible with 4-port, dual source network analyzers.

Key benefits

Traceable multimode S21 test, right at 850 nm target wavelength

IEEE 802.3ae launched power distribution leads to test results comparable to the final application

Fast and easy measurement setup and calibration for all standard tests

High confidence and fast time-to-market with a traceable turnkey solution

Significantly increased productivity using the fast and easy measurement setup with an unique new calibration process leads to lower cost of test

Test right at target launch condition eliminates test uncertainty

Identical LCA software and remote control across the N437xD family simplifies integration and backward compatibility to N437xB/C series

Keysight N4376D Applications

In digital photonic transmission systems, the performance is ultimately determined by bit error ratio test (BERT), as this which describes the performance of the whole system. However it is necessary to design and qualify subcomponents like modulators and receivers, which are analog by nature, with different parameters. Those parameters are core to the overall system performance.


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