Breakthroughs and Applications of Taijing Technology's Differential Crystal Oscillators in the Field of Optical Modules

In the rapidly developing optoelectronic industry in recent years, optical modules, as important basic components, have an increasingly wide range of applications, from data centers to 5G communication, reflecting their indispensable position. The telecommunications end includes devices such as video optical transceivers, wireless base stations, transmission systems, PON networks, fiber optic transceivers, etc; The Internet side is the server, switch, router, base station equipment, etc. related to the data center that has emerged in recent years. It is expected that the global optical module market size will reach $23.5 billion by 2025, with significant growth in AI server optical modules. 1.6T optical modules are expected to exceed 10 million units by 2026, driving rapid growth in demand for high-frequency differential crystal oscillators.

The Function and Importance of Quartz Crystal Oscillators

1. Timing clock signal supply: Quartz crystal oscillator provides high-precision reference clock for key chips such as DSP, FPGA, MCU inside the optical module, ensuring coordinated operation of various functional modules.

2. Performance parameter requirements: The frequency error of the 100GQSFP28 optical module crystal oscillator should be controlled within+20ppm, and the phase noise should reach -130dBc/ Hz@10kHzoffset The jitter is controlled within the 1psRMS range. 400G/800G modules have more stringent performance requirements.

3. System stability guarantee: Crystal oscillator failure may lead to issues such as abnormal optical power, unstable links, and increased bit error rates. Optical module manufacturers need to conduct strict high and low temperature testing (-40 ° C to 105 ° C), vibration testing, phase noise testing, etc.

4. Key performance indicators: The 1.6T optical module requires a differential crystal oscillator based on photolithography technology, with key frequency points of 156.25MHz and 312.5MHz. To ensure signal integrity during long-distance transmission, the phase jitter of the crystal oscillator should be less than 64 femtoseconds (with a typical value of 35 femtoseconds), the frequency accuracy should be within ± 20ppm, and it should be able to operate stably in an industrial wide temperature range of -40 ℃ to 105 ℃. At the same time, in order to adapt to the trend of miniaturization of modules, it is necessary to use 2.5x2.0mm or smaller packaging. These high requirements are directly related to the transmission distance, bit error rate, and signal integrity of the optical module.

Technological Development Trends

1. High frequency trend: With the increasing demand for AI computing power, the speed of optical modules is evolving from 100G to 400G, 800G, and even 1.6T, and the requirements for crystal oscillator frequency are constantly increasing. The 800G optical module requires a high-frequency differential crystal oscillator of 156.25MHz, while the 1.6T optical module requires higher frequency support.

2. Miniaturization packaging: The size of crystal oscillator packaging has evolved from the traditional 7.0 × 5.0mm to smaller 2.5 × 2.0mm or even 1.6 × 1.2mm. Taijing Technology has launched high baseband products in 2520 packages to meet the space limitations of 800G/1.6T optical modules.

3. Wide temperature stability: Expanding from commercial grade 0 ° C to 70 ° C to industrial grade -40 ° C to 105 ° C or even wider, to adapt to complex environments in data centers and outdoor deployments, and meet the stable working requirements of optical modules under various temperature conditions.

4. The competitive landscape between quartz crystal oscillators and MEMS crystal oscillators: Traditional quartz crystal oscillators still dominate the high-end optical module market due to their high frequency (>200MHz) and high precision advantages. MEMS crystal oscillators are gradually penetrating in mid to low end scenarios due to their anti vibration, anti impact, low power consumption, and small size characteristics. The two will form a complementary pattern, ultimately leading to differentiated competition.

Advantages of Taijing Optical Module Crystal Oscillator Application

Although quartz crystal oscillators account for a relatively small proportion (1% -5%) in optical modules, they are crucial components for ensuring the stable operation of high-speed optical communication systems. With the explosive demand for AI computing power and the improvement of optical module speed, high-frequency differential crystal oscillators will become the core driving force for market growth, and the market size is expected to reach 2-5 billion US dollars. To meet the increasingly stringent timing signal requirements of high-speed data transmission and processing scenarios, Taijing Technology has launched a series of low jitter, high-precision, high-frequency, miniaturized, and high-temperature resistant differential crystal oscillator products, providing highly reliable clock solutions for related application scenarios.

• Born to meet the stringent requirements of high-speed optical modules and optical communication, the following is our performance guide:

Common frequency points for optical modules: 156.25MHz, 312.5MHz, 625MHz;

The frequency stability is ± 20PPM, and the aging rate is only ± 3PPM/year. It has stable vibration characteristics under extreme environmental conditions, starting within 3ms, and has the characteristics of high precision, high stability, and high reliability;

Complete packaging sizes available, offering multiple packaging sizes of 3225/2520/2016, to meet the demand for miniaturization of optical modules;

Compatible with multiple voltages ranging from 1.8V to 3.3V, with tri state output TTL/HCOMS compatibility;

The working temperature supports -40 ℃~+85 ℃ and -40 ℃~105 ℃. It can continue to work stably in special environments and is not prone to "temperature drift", thus meeting the high temperature requirements of optical modules and working normally under wide temperature conditions.

• Characteristics of pure localization scheme:

1.100% Domestic Chips and Packaging: Using independently developed photolithography high-frequency chips, the packaging materials and processes are fully domestically produced.

2. Fully independent intellectual property rights: from product design, product assembly to product testing, mastering core technologies throughout the entire process without external dependencies.

3. Rapid response and flexible customization: Relying on local supply chains, we support customers in quickly sampling, small-scale trial production, and large-scale delivery.