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]

Group 1 - The company, Guangku Technology, confirmed that its fiber laser products include isolators, combiners, fiber gratings, and laser output heads, primarily used in fiber laser applications [2] - An investor inquired about the potential application of the company's laser technology in photovoltaic and PCB circuit board sectors [2] Group 2 - The company operates in the fiber laser industry, which is experiencing growth due to increasing applications in various fields [2] - The interaction indicates investor interest in the diversification of laser applications beyond traditional uses [2]