The experimental investigation of the influence of optical feedback on the pulse analysis of GaAlAs laser diode is represented. with an experimental setup designed for this purpose. Optical feedback was constructed with a plane mirror facing the facet of the laser diode at a distance of ( 16 cm ). Phase control and feedback rate were varied according to the external cavity length with... https://www.parisnaturalfoodes.shop/product-category/duo-absolut-arnica/