However, my experience purchasing an fp laser diode was very positive when I contacted the Innolume https://www.innolume.com/innoproducts/fabry-perot-laser-diodes/ At first, I was worried that I would order a low-quality diode, but the consultants explained the characteristics and differences between the types in detail. The diode arrived neatly packaged, undamaged, and with complete technical documentation. During use, I noticed stable performance, minimal noise, and high efficiency. I particularly appreciate that the store pays attention to customer support and provides useful advice on connection and safe operation. Now I am confident that choosing Innolume is a combination of reliability, quality, and attention to detail. So, I highly recommend them.