Efficient Optical Intensity Modulator Based on the Electrically Tunable LiNbO₃ Reflection Grating for Analog Fiber-Optic Links

Poling Quality Evaluation of Periodically Poled Lithium Niobate Using Diffraction Method

“…The development of domain-engineered crystals has gained significant importance not only in nonlinear optical frequency conversion processes [1], but also in linear polarization control or modulation devices [2,3]. Quasi phase matching (QPM) devices have been successfully realized in ferroelectric crystals such as lithium niobate (LiNbO3), lithium tantalate (LiTaO3) and potassium titanyl phosphate (KTiOPO4) by the process of electric field poling, in which the domain structures are designed to compensate the mismatch among the wave vectors of the interacting light beams.…”

Amplitude Modulation Response and Linearity Improvement of Directly Modulated Lasers Using Ultra-Strong Injection-Locked Gain-Lever Distributed Bragg Reflector Lasers

“…The requirements for analog and digital signal transmissions are quite different. Low radio-frequency (RF) link loss and small nonlinear distortions are needed to achieve good analog performance, while high modulation bandwidth, low chirp and high extinction ratios are important for digital links [3,4]. Link loss in directly modulated links is mainly due to the electrical-to-optical conversion process in lasers.…”