Abstract: A tunable multisection laser of the invention includes an active layer (C2) which is thicker in a phase tuning section (S3) and in a grating section (S2) including a Bragg distributed reflector (R) having a controllable equivalent pitch than it is in a light amplification section (S1). The invention is particularly applicable to making components for telecommunications by means of optical fibers.

Abstract: An automobile automatic transmission control device consists of a sector fixed to a vehicle. A control lever is pivoted to the sector about a fixed axis. A plurality of lockout notches are formed on an edge of the sector along a locus centered on said fixed axis. A plurality of self-locking notches are formed in said sector about a locus centered on said fixed axis. The control lever is provided with a rod biased into engagement with the lockout notches so as to prevent the unintentional pivoting of the lever. The control lever is also provided with a plurality of self-locking elements which cooperate with the self-locking notches to establish transmission selection positions. The rod can be moved out of engagement with the lockout notches by engagement of a trigger release mounted on one end of the lever.