As the core hub for converting optical and electrical signals, the operating stability of optical transceiver directly determines the reliability of communication links. However, during operation, optical transceiver generates significant heat dissipation, which can easily cause wavelength drift in internal laser diode. This not only affects optical power output but may also lead to crosstalk between adjacent channels, disrupting normal information transmission. To address this, the industry commonly uses EXSENSE gold termination NTC chip as temperature-sensing component in optical transceiver. It realizes the real-time perception of the junction temperature of the optical transceiver through the change of NTC resistance value, providing a data basis for its over-temperature protection and temperature monitoring.

The placement of EXSENSE gold termination NTC chip in optical transceiver determines how accurately it monitors temperature. Currently, most designs mount the NTC chip on the heat sink substrate of laser diode through silver glue, with the substrate fixed on a TEC. At the same time, a bonded gold wire is used to connect the NTC to the pin of laser diode, allowing the EXSENSE bare chip to quickly obtain the laser's junction temperature. When the operating temperature of optical transceiver exceeds preset threshold, the MCU can execute several protective measures:

1. Send a signal to the TEC driver module to adjust cooling or heating power of TEC so that the laser diode works in a suitable temperature range.
2. Dynamically adjust the bias current and driving power of the laser diode to counteract issues caused by temperature changes, such as shifts in laser diode threshold current or decreased luminous efficiency.

The high-efficiency temperature monitoring of optical transceiver with the help of EXSENSE gold termination NTC chip relies on its excellent electrical performance:

1. The resistance tolerance of mainstream optical transceiver NTC can reach ±1%, providing accurate temperature information for the optical transceiver to adjust its junction temperature, ensuring long-term wavelength stability, improving communication quality, and reducing system error rates.
2. EXSENSE gold termination bare chip can reach a dimension of 0.21mm × 0.21mm. Its small dimension saves installation space in the optical transceiver, and being closer to actual heat sources, resulting in a faster thermal response speed, reducing measurement errors and increasing the timeliness and accuracy of temperature monitoring.

As the temperature-sensing 'sentinel' of optical transceiver, EXSENSE gold termination NTC chip provides real-time feedback of internal thermal states through resistance values change, giving MCU the data to make decisions. Thanks to EXSENSE gold termination NTC chip, optical transceiver can maintain great data transmission quality under complex conditions, reduce failures caused by temperature monitoring errors, optimize internal layout, and enhance overall integration.