The present invention provides a laser oscillator using an electroluminescent material that can enhance directivity of emitted laser light and resistance to a physical impact. The cabin exhaust device comprises a squeegee and a ventilation panel having an air dam, a first portion, and a second portion, wherein the first and second portions are provided with angularly oriented apertures, thereby creating a vacuum on the vehicle’s interior side. Distensible elements may be in the form of expandable pneumatic chambers or electro-mechanical elements such as solenoids, shape memory elements, electrostatic plates, etc. A detector array is positioned to receive the respective portions of the demultiplexed wavelengths and by comparing their relative intensity it is possible to detect any drift in the nominal wavelengths of the channels. At least one recess is provided in order to allow the engagement of the roots of the mobile blades, wherein the rotor element comprises at least two consecutive individual rings having at their lateral periphery one annular half-profile which, during the axial juxtaposition of the two individual rings, form a complete recess in which the roots of the series of mobile blades are engaged. The instrument may further comprise a catching member for each tissue to be attached; a rod linked to each catching member enabling tension to move axially, said rod being separable from said catching member when a tension is exerted on it beyond a certain threshold; and a member forming a stop for locking axially each catching member during said tension.