In the world of test and measurement, "transparency" is the ultimate goal. A modulator used in a Bit Error Rate (BER) tester or an Optical Component Analyzer (OCA) must not introduce its own distortions or non-linearities into the signal path. Traditional bulk lithium niobate modulators, while reliable, often lack the sheer bandwidth required to test 1.6T or 3.2T components. Silicon-based alternatives, on the other hand, often suffer from high insertion loss and limited power handling, which can compromise the signal-to-noise ratio (SNR) of the test setup.
Liobate technologies address these challenges by providing a TFLN platform that combines an ultra-wide electro-optic (EO) bandwidth with a nearly perfect linear Pockels response. In various photonic applications—ranging from high-speed waveform generation to polarization-dependent loss (PDL) testing—our modulators act as a "gold standard" reference. Because we control the entire fabrication process, we can ensure that our test-grade modulators exhibit minimal EO roll-off, allowing for accurate characterization of devices under test (DUT) up to 110 GHz and beyond.
Precision Specifications for the Instrumentation Market
For B2B clients in the instrumentation sector, consistency across the frequency spectrum is paramount. When we design modulators for test environments, we prioritize flatness of response and high extinction ratios to ensure that the test signals remain clean and repeatable.
Our portfolio for the instrumentation market includes several specialized devices with industry-leading specifications:
110 GHz Intensity Modulators: Specifically designed for OEO (Optical-Electrical-Optical) conversion and frequency identification, these chips feature a 3dB-bandwidth exceeding 110 GHz and an on-chip insertion loss as low as 2.5 dB.
Ultra-Low Driving Voltage: By maintaining a voltage of less than 3.0 V, our modulators can be driven by standard laboratory RF signal generators without the need for external high-power amplifiers, which often introduce unwanted noise and jitter.
High Power Handling: Testing high-loss passive networks requires a high optical input. Our TFLN waveguides are engineered to handle high optical power levels (up to 100 mW hybrid configurations) without manifesting the photorefractive effects that typically plague traditional LN devices at high intensities.
The Role of the IDM Model in Metrology Reliability
The manufacturing of test-grade components requires a level of process stability that only an Integrated Device Manufacturer (IDM) can provide. At Liobate, our vertical integration ensures that every modulator destined for a test instrument undergoes rigorous wafer-level and module-level characterization.
When a test equipment manufacturer integrates a Liobate chip, they are benefiting from our internal feedback loops that correlate fabrication parameters—such as waveguide etch depth and electrode gap spacing—directly to the final RF performance. This allows us to provide "matched pairs" of modulators for differential testing or multi-channel arrays with highly uniform phase and amplitude characteristics. This level of precision is essential for characterizing Coherent optical communication systems, where phase noise and quadrature imbalance must be measured with sub-degree accuracy.
Advanced Techniques for Polarization and Phase Control
Beyond simple intensity modulation, modern test systems require sophisticated control over the polarization and phase of light. Liobate has developed integrated TFLN PICs (Photonic Integrated Circuits) that combine multiple functionalities onto a single chip, such as polarization controllers, phase shifters, and IQ modulators.
One of the advanced techniques we employ is the use of TFLN-on-Quartz substrates. This choice of handle material significantly reduces microwave absorption at frequencies above 67 GHz, which is the range where 6G and 800G/1.6T testing occurs. By minimizing substrate-related losses, we ensure that the electrical signal reaches the optical waveguide with maximum integrity, resulting in a cleaner eye diagram and more accurate jitter measurements for the end-user.
Supporting the Global Ecosystem of Optical Communication Systems
As the backbone of the digital economy, optical communication systems must be validated with uncompromising rigor. Whether it is for long-haul telecommunications, data center interconnects (DCI), or the emerging field of quantum networking, Liobate is committed to providing the "eyes" and "ears" of the industry.
Our ability to deliver high-yield, mass-produced TFLN modulators with laboratory-grade performance is transforming the test and measurement landscape. By reducing the size and power requirements of the modulation stage, we are enabling the development of portable, field-ready test sets that can verify 400G and 800G links in-situ with the same accuracy previously reserved for the laboratory bench.
Conclusion: Setting the Standard for Precision Modulation
In the high-stakes environment of optical testing, there is no room for ambiguity. The hardware must be better than the system it is testing. Liobate’s mission is to provide that superior hardware. Our precision TFLN modulators represent the pinnacle of current electro-optic technology, offering the bandwidth, linearity, and stability required to push the boundaries of what is measurable.
By integrating Liobate technologies into your instrumentation portfolio, you are ensuring that your customers have access to the most accurate data possible. From the initial PIC design to the final high-speed packaging, we oversee every detail to ensure that our products meet the highest standards of the B2B metrology market.
The previous article
Returns the list
