689/690 is a deep red ,i have a custom labby built for me by lazeerer who makes our drivers. He did this sometime back when he was still around the forum. I used it once and its still in the shipping box.
689nm lasers have been available for a long time both DPSS and direct diode more recently---as the CNI data sheet says: --689nm is widely used in communication, medical treatment, scientific research, etc
From 2011 -- " We report for the first time a coherent red radiation at 689 nm by intracavity sum-frequency generation of the 1319- and 1444-nm laser-lines of two Nd:YAG lasers. Using type-II critical phase matching KTP crystal, 689-nm red laser was obtained by 1444- and 1319-nm intra-cavity sum-frequency mixing, and output power of 156 mW was obtained." See: https://link.springer.com/article/10.1134/S1054660X1113010X
Used in Photodynamic Therapy of eye problems like macular degeneration---optical clocks, gas sensing systems for strontium detection, laser cooling of strontium
That CNI has a data sheet probably just means CNI sees a market for or has a customer for low cost Chinese made 689nm lasers.