Laser is key component of optical transceiver, and its wavelength and output power are extremely sensitive to temperature changes. As an "outstanding elite" of temperature sensing, NTC chip can accurately sense the temperature change of the laser, provide temperature feedback for the stable operation of the laser, and ensure the normal operation of the optical transceiver.

Taking advantage of the negative proportional correlation between the resistance value of the NTC chip and the temperature, it can help the TEC in the laser to adjust the temperature, so as to stabilize the laser wavelength and avoid abnormal signal transmission caused by temperature changes. Specifically, if the junction temperature of the laser is too high or too low during operation, the laser wavelength will be shifted and the transmission quality of the optical signal will be affected. At this point, the bare chip on the TEC converts the temperature signal monitored in real time into an electrical signal and feeds it back to the TEC. The TEC then cools or heats the laser based on this signal, which stabilizes the laser junction temperature within a preset temperature range. In addition, NTC chips also play the following roles in lasers:

1. Improve the reliability of the laser and extend its service life

Lasers work in extreme temperature environments, which are prone to problems such as wavelength instability and shortened transmission distance. The addition of NTC chip can assist the laser to avoid these problems. Therefore, the accuracy temperature control of the bare chip effectively improves the reliability of the laser. In addition, the temperature control of the NTC chip can also reduce the risk of aging caused by abnormal temperature changes to the laser and prolong its service life.

2. Prevent laser modulation distortion

Temperature anomalies can cause the laser emission wavelength to drift, resulting in modulation distortion. This is because the temperature changes the refractive index and bandgap width of the active region of the laser, causing changes in the energy and wavelength of the emitted photons. For optical communication systems with high wavelength accuracy requirements, such as dense wavelength division multiplexing (DWDM), even small wavelength drifts can lead to increased signal crosstalk and bit error rates. By stabilizing the temperature of the laser, the NTC chip effectively avoids the drift of the emission wavelength, thereby preventing modulation distortion and ensuring the accurate transmission of optical signals.

NTC chip works in tandem with TEC to ensure the accurate transmission of laser optical signals in complex temperature environments, which is essential for high-speed, large-capacity optical communication systems. To this end, EXSENSE Electronics has specially developed and produced a special gold electrode NTC chip for optical transceiver, which high-accuracy characteristic helps to improve the temperature measurement accuracy inside the laser and stabilize the operation of optical transceivers. At the same time, its small size can meet the miniaturization development trend of today's optical transceivers and promote the progress of the industry.

With the continuous development of the optical communication industry, the in-depth coverage of 5G networks, the large-scale construction of data centers, and the research and development of future communication technologies, the demand for optical transceivers will continue to grow, and the requirements for their performance will continue to increase. This will undoubtedly further promote the development of gold electrode NTC chips for optical transceivers, and promote their innovation and upgrading in terms of accuracy, response speed and stability. EXSENSE Electronics will also continue to improve R&D level, so that the gold electrode NTC chip for optical transceivers can provide reliable support for the continuous progress of optical communication technology.