Anritsu enhances OSA for high-power laser diode measurement function

Created August 10, 2023
Technologies and Products

Anritsu Corporation has introduced a measurement function (MS9740B-020) for its Optical Spectrum Analyzer MS9740B that evaluates a pulsed Laser Diode (LD) chip. The company says the new solution reduces the test time for pulsed LD chip, contributing to improved production efficiency of high-power LD chip. The new MS97040B-020 solution accelerates optical spectrum evaluation by eliminating the need for a trigger signal. LD chip manufacturers and optical equipment vendors evaluate the optical spectrum of LD chips during manufacturing.

It also offers assured measurement reproducibility for even high-power LD chips This solution assures measurement reproducibility of ±1.4 dB with MS9740B-020 installed for Side Mode Suppression Ratio (SMSR). Low SMSR variation improves the LD chip yield and helps production efficiency.

Anritsu says market demand for high-power LD chips is driven by higher communication bit rates and longer LiDAR detection ranges. In addition, new use cases, such as External Laser Small Pluggable (ELSFP) modules for Co-packaged Optics applications, are expected to accelerate demand. The continuous wave (CW) output from a high-power LD chip suffers power drift and wavelength shift as the chip temperature rises. This is prevented by suppressing the temperature rise by using pulsed LD chips. However, current testing of pulsed LD chips during production takes longer because an external trigger signal is required to synchronize with the pulsed LD chip.

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This article was written
by Peter Dykes

Peter Dykes is a independent telecoms and technology journalist who has over that last 30 years written for a wide range of B2B publications and companies. A former BT engineer, he specialises in networks and associated support systems. He is currently Editor of Optical Connections.