TKD: Empowering Innovation in High-Speed Optical Modules with Differential Crystal Oscillator Technology
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Release Time：2026-01-09
TKD has been deeply engaged in the field of frequency control. Its differential crystal oscillator product series, with their outstanding technical features, are becoming a key support for achieving performance breakthroughs in high-end optical modules.
In recent years, driven by robust growth in fields such as data centers, 5G communications, and artificial intelligence, optical modules have been rapidly evolving toward higher speeds, greater density, and lower power consumption. As the “clock heart” of optical modules, the performance of differential crystal oscillators directly determines the stability and reliability of signal transmission. 。 TKD is deeply rooted in the field of frequency control. Its differential crystal oscillator product series, with their outstanding technical features, are becoming a key enabler for achieving performance breakthroughs in high-end optical modules.
01
Core technological advantages: precision, compactness, and efficiency
TKD differential crystal oscillators innovate around three key dimensions—high-frequency stability, miniaturized packaging, and energy-efficiency optimization—effectively addressing the design challenges of high-speed optical modules.
● High-frequency signal integrity assurance: As the operating rates of optical modules climb to 800G/400G, the phase noise and jitter performance of clock signals become decisive factors determining the system's bit error rate. Through advanced crystal design and circuit optimization, TKD has achieved ultra-low phase noise and femtosecond-level jitter output. For example, its differential oscillator designed for high-speed optical communication exhibits excellent phase noise performance at critical frequencies such as 156.25 MHz and 312.5 MHz, significantly reducing timing errors in high-speed serial links and providing a clean clock reference for high-order modulation signals like 112 Gbps-PAM4.
● Spatial adaptability and integrated design: To accommodate the increasingly compact layout of optical modules, TKD has launched several small-size differential crystal oscillators, with packages covering mainstream specifications such as 2016, 2520, and 3225. Compared to traditional solutions, this approach can reduce the device’s board footprint by up to 50%, freeing up valuable space for internal wiring, thermal management, and functional expansion within optical modules. This miniaturization advantage is particularly well-suited for high-density pluggable modules such as QSFP-DD and OSFP, helping customers boost the transmission capacity per rack.
● Energy Efficiency Improvement and Thermal Management: In the face of the demand for a green transformation of data centers, TKD has introduced low-power architectures and intelligent output regulation technologies into its products. Its unique low-voltage differential output design effectively alleviates the thermal load on optical modules. Excellent power consumption control not only extends device lifespan but also contributes to improved system-level energy efficiency.
02
Temperature-compensated high-base-frequency differential crystal oscillator: a stable timekeeper in harsh environments.
Temperature variation is one of the primary factors affecting the accuracy of crystal frequency. TKD will adopt temperature compensation technology ( TCXO ) Combined with high-frequency crystals, we have launched a series of temperature-compensated, high-frequency differential crystal oscillators specifically designed for applications with significant environmental stress, demonstrating unique value in optical modules:
● Frequency stability across the entire temperature range: This product series Equipped with a built-in high-sensitivity temperature sensing and compensation circuit, it maintains a high frequency stability of ±20 ppm over an extended temperature range from -40℃ to +105℃ and even wider. This is crucial for optical modules in scenarios with significant temperature differences, such as outdoor 5G fronthaul and edge data centers, ensuring that the clock signal does not drift with fluctuations in ambient temperature.
● Coordinated high carrier frequency and low phase noise: By selecting high-frequency fundamental-mode crystals and optimizing the oscillator circuit, TKD temperature-compensated differential crystal oscillators achieve... While outputting high-frequency signals (such as 156.25 MHz, 312.5 MHz, etc.), it still maintains an extremely low phase-noise floor. The high-frequency design reduces the degradation of phase noise caused by frequency multiplication stages, directly outputs the desired frequency, simplifies the clock tree design of optical modules, and further enhances overall signal quality.
● Enhance system transmission limits: In long-distance transmission applications, optimizing clock phase noise can directly translate into an improvement in the system link budget. Measured results show that... After adopting a high-performance temperature-compensated differential crystal oscillator, the bit error rate of the optical module can be optimized from the order of 10⁻¹² to below 10⁻¹⁵, which effectively extends the transmission distance significantly while maintaining the same bit error performance. For infrastructure such as submarine optical cables and backbone networks, this means the number of relay stations could be reduced, thereby lowering construction and maintenance costs.
03
Application value in optical modules
TKD differential crystal oscillators can be widely used in 400G/800G/1.6T multi-rate optical modules, and their value is reflected in:
● Provide a reliable clock for high-speed interfaces: As a SerDes The reference clock for CDR or modulation driver circuits ensures precise sampling of high-order modulation signals such as PAM4.
● Enhance environmental adaptability: The Wenzhu High-Frequency Series helps industrial-grade, automotive, and outdoor communication equipment withstand temperature challenges and enhance network reliability.
● Enabling module miniaturization and energy efficiency: Small size and low-power characteristics enable high-density port designs and the construction of green data centers.
As the technological path for 1.6T optical modules becomes increasingly clear, higher demands are being placed on clock sources in terms of frequency, jitter, power consumption, and integration. TKD continues to invest heavily in R&D, and its differential crystal oscillator products are evolving toward higher frequencies, lower jitter, and smarter temperature compensation—aiming to pave the way for the next generation. Optical Interconnect Providing core timing solutions to support the global digital infrastructure’s journey toward a faster, more reliable, and more energy-efficient future.
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