LASER SENSOR MODULE WITH ELECTRO-OPTICAL MODULATOR

The invention relates to a laser sensor module for interference based particle detection comprising a Vertical Cavity Surface Emitting Laser (100), an electro-optical modulator (250) and a light detector (200), wherein the Vertical Cavity Surface Emitting Laser (100) comprises a first electrical contact (105), a second electrical contact (135) and an optical resonator, wherein the optical resonator comprises a first distributed Bragg reflector (115), a second distributed Bragg reflector (130) and an active layer (120) arranged between the first distributed Bragg reflector (115) and the second distributed Bragg reflector (130), wherein the Vertical Cavity Surface Emitting Laser (100) is arranged to emit laser light (315) during operation of the Vertical Cavity Surface Emitting Laser (100), wherein the electro-optical modulator (250) is integrated in the optical resonator, wherein the electro-optical modulator (250) is arranged to tune a resonance frequency of the optical resonator by means of an electrical tuning voltage applied to the electro-optical modulator (250), wherein the light detector (200) is arranged to detect an optical response in reaction to the laser light (315) emitted by the Vertical Cavity Surface Emitting Laser (100), wherein the tuning voltage is arranged such that a detection signal caused by a macroscopic object (25) positioned in a range between a threshold distance and a detection range of the particle sensor module is reduced in comparison to a detection signal caused by the macroscopic object (25) at the same position without providing the tuning voltage, wherein the detection signal is received by the light detector (200) when providing the tuning voltage.The invention further relates to a corresponding laser sensor (300), a particle detector comprising such a laser sensor (300), a mobile communication device comprising such a particle detector or laser sensor (300) and a corresponding method of particle detection.