As a core component of optical communication system, optical transceiver is widely used in fields such as 5G, data center, LiDAR, etc. As a key component in optical transceiver that converts electrical signal into optical signal, the performance of laser directly affects the quality of communication. The stable operation of the laser is affected by the junction temperature. As a temperature-sensitive component, the NTC chip plays a crucial role in temperature monitoring and feedback in the laser.

When the optical transceiver is powered on, the NTC chip works in conjunction with the TEC to maintain the laser's operating temperature within an optimal range. To achieve better temperature measurement, the upper surface of the NTC chip is connected to the laser pin through wire bonding technology, while the lower surface is connected to the TEC through soldering technology. When the NTC detects the laser temperature, the change in its resistance value is converted into a voltage signal. Subsequently, this signal is compared with a reference voltage corresponding to the set temperature, and the resulting error signal is processed by the control circuit. The TEC adjusts its heating or cooling function according to the current direction, stabilizing the laser junction temperature.

In conclusion, to ensure that optical transceiver can obtain accurate temperature data in real time, EXSENSE recommends using the DT series gold termination NTC chip. Compared with traditional NTC chip, what unique features enable this bare chip to play an irreplaceable role in optical transceiver temperature control?

1.Small dimension, suitable for high-density encapsulation

In recent years, optical transceiver has been steadily moving toward miniaturization. To help manufacturers increase encapsulated density, EXSENSE has developed and mass-produced gold termination NTC chip sized 0.21mm × 0.21mm, effectively optimizing the internal layout of lasers. Moreover, the smaller NTC size provides more excellent sensitivity, accelerating the temperature control process of optical transceiver.

2.High accuracy, ensuring accurate temperature measurement

The accuracy of the gold termination bare chip can reach ±1%, ensuring accuracy temperature monitoring. This allows the TEC to better control the laser junction temperature, preventing wavelength drift or signal distortion caused by temperature measurement errors.

3.Great reliability, ensuring long-term stable operation

The annual drift of EXSENSE gold termination NTC chip is low, which helps optical transceiver maintain stable temperature control and improve the laser's operational efficiency.

With accuracy temperature sensing and rapid response, gold termination NTC chip resolves abnormal temperature impacts on laser wavelength stability and output power, making it a key component in optical transceiver operation. In addition, compared to traditional silver termination bare chip, EXSENSE gold termination NTC chip offers better consistency, providing superior temperature monitoring for optical transceiver and ensuring reliable operation of optical communication system.