RP Photonics Encyclopedia is a comprehensive resource with in-depth information in the field of optics and photonics. This free resource offers valuable information in the form of over 1031 encyclopedia articles covering a range of topics including optics and photonics, optoelectronics, quantum optics, fiber optics, ultrashort light pulses, laser technology, gas discharge lamps, laser material processing, lightwave communications, spectroscopy, and optical metrology.

The content of RP Photonics Encyclopedia, formerly known as the Encyclopedia of Laser Physics and Technology, is produced by Dr. Radiger Paschotta at RP Photonics. This open access database is scientifically robust and offers a great deal of knowledge on lasers, nonlinear, and fiber optics. It serves as a valuable reference source for both scholarly researchers and industrial professionals globally.

This encyclopedia also exhibits helpful functionality like a convenient search page for full-text searches on the whole website. Although, a keyword search is only possible in the titles of encyclopedia articles and requires Javascript. This might be a downside for users with Javascript turned off in their browser.

Additionally, RP Photonics Encyclopedia features a Buyer's Guide and offers consulting services and software solutions. A clear downside is the lack of articles based on some keywords. This suggests that some specific topics might not be covered by the existing content.

In conclusion, RP Photonics Encyclopedia is a solid option for those seeking in-depth information about optics and photonics and various related fields. It is a credible and expansive resource that covers broad spectrum topics and serves as a guide as well as a consulting platform for users. However, potential users should be aware of its limitations such as the dependency on Javascript for certain functionalities and potential gaps in topic coverage.