光库科技：光纤激光器件产品包括隔离器等

Group 1 - The core viewpoint of the article is that Guangku Technology (300620) has clarified its product offerings and applications in response to investor inquiries [1] - The company's fiber laser device products include isolators, combiners, fiber gratings, and laser output heads [1] - These products are primarily used in the field of fiber lasers [1]