Abstract Fourier domain mode locked (FDML) lasers are a class of frequency-swept that used to generate optical pulses with wide sweep range, high repetition rate, and low instantaneous bandwidth. They commonly in sensing imaging applications, especially coherence tomography. Ideally, the aspired features design FDML include length, large bandwidth, adjustable output power, signal noise ratio (S...

We experimentally demonstrate enhanced self-phase modulation (SPM) in silicon nitride (Si3N4) waveguides integrated with 2D graphene oxide (GO) films. GO films are onto Si3N4 using a solution-based, transfer-free coating method that enables precise control of the film thickness. Detailed SPM measurements carried out both picosecond and femtosecond optical pulses. Owing to high Kerr nonlinearity...

A fiber-optic strain measurement technique based on data dependent system (DDS) in Mach-Zehnderfiber interferometer is presented. The interferogram recorded from the interferometer has been digitized and characterized by means of an autoregressive model. The phase change due to the measurand has been obtained from the self-coherence function of the interferogram. It would provide the phase dist...

The bandwidth and performance of optical phase-lock loops (OPLLs) using single-section semiconductor lasers (SCLs) are severely limited by the nonuniform frequency modulation response of the lasers. It is demonstrated that this restriction is eliminated by the sideband locking of a single-section distributed-feedback SCL to a master laser in a heterodyne OPLL, thus enabling a delay-limited loop...