Research on Bias Point Control Technology for Array-Type Electro-Optical Modulators Based on Lithium Niobate(Invited)
Due to the influence of inherent characteristics of material,the bias operating point of electro-optic modulator may drift with changes in environment,thereby affecting the modulation performance of the modulator.To solve the bias point drift issue of lithium niobate Mach-Zehnder electro-optic modulators,bias control techniques suitable for 4-array parallel electro-optic modulators is researched.Based on time division multiplexing,adjustable gain amplitude,dual pattern recognition,and other methods,a control method combining optical power and disturbance signal amplitude detection is proposed,which reduces hardware redundancy and achieves precise control of the bias operating point.
electro-optical modulationtime division multiplexingbias controloptical power detectionperturbation signal detection
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