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| In comparison to a typical optically pumped semiconductor laser (top), a doubled-diode laser (DDL, bottom right) relies on just two main components: a 976 nm telecom diode and a nonlinear crystal. The 976 nm diode output is frequency doubled to 488 nm and output powers of up to 40 mW are achievable. The reduced number of optical surfaces in the DDL minimizes its losses, which in turn increases its efficiency. |
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