I get a fair number of confidential phone calls and e-mails reporting coherent receivers unlocking due to very fast SOP transient events. These transients can be hundreds of thousands of radians per second, even over 1 million radians per second, within 10s of microseconds, followed by a slower relaxation in a few milliseconds. Such ∆SOPs Read more about Are Ultrafast SOP Events Affecting Your Coherent Receivers?[…]