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![Amiet R. Kashyap on Twitter: "Btw DRDO's SSPL has also developed a Blue Laser Diode based submarine communication sys. It uses Blue GaN laser diode directly modulated by pre-leveled 16-QAM(quad) orthogonal frequency Amiet R. Kashyap on Twitter: "Btw DRDO's SSPL has also developed a Blue Laser Diode based submarine communication sys. It uses Blue GaN laser diode directly modulated by pre-leveled 16-QAM(quad) orthogonal frequency](https://pbs.twimg.com/media/Ec4pP66UMAEM-Ww.png)
Amiet R. Kashyap on Twitter: "Btw DRDO's SSPL has also developed a Blue Laser Diode based submarine communication sys. It uses Blue GaN laser diode directly modulated by pre-leveled 16-QAM(quad) orthogonal frequency
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