Study of a compact radiation source for fiber-optic interferometric phase sensors

This paper discusses the optical and electrical characteristics of the RayCan RC32 laser diode, with a vertical cavity that emits at a wavelength of 1550 nm, as a function of various operating regimes. The possibility of using laser diodes with a vertical cavity in fiber-optic interferometric phase sensors is considered. An experimental method of obtaining the coherence function of a laser diode with a vertical cavity is also used to obtain the dependences of the variation of the central wavelength of the radiation and the width of the spectral components when the laser is directly modulated in current at various frequencies and with various inverse duty cycles.