Location History:
- Enskede, SE (2002 - 2005)
- Stockholm, SE (2009)
Company Filing History:
7 out of 25,736 
1 out of 16 Years Active: 2002-2009
Title: Innovations of Johan Sandell
Introduction
Johan Sandell is a notable inventor based in Enskede, Sweden. He holds a total of 8 patents, showcasing his contributions to the field of optical communication systems. His work has significantly impacted the way management information is conveyed in Wavelength Division Multiplexing (WDM) systems.
Latest Patents
One of his latest patents is a method for conveying management information in a WDM system. This invention relates to a method for conveying management information from a number of wavelength converters to a central management unit. A management information signal is superimposed on the WDM signal from each wavelength converter. A fraction of the optical signal in the common optical transmission line is tapped off to a detector, allowing the different management information signals to be recovered by a receiver unit connected to the detector. Another significant patent is for a WDM optical communication system. This invention concerns a method and apparatus for controlling the signal output power of an optical amplifier. The target output power used to monitor the amplifier output power comprises the sum of the desired signal output power and an estimation of the amplified spontaneous emission (ASE) generated at this power. The relationship between the gain of an amplifier and the generated ASE is determined through measurements, allowing for stabilization of the amplifier output.
Career Highlights
Throughout his career, Johan Sandell has worked with prominent companies in the telecommunications industry. He has been associated with Telefonaktiebolaget LM Ericsson and Transmode Systems AB. His experience in these organizations has contributed to his expertise in optical communication technologies.
Collaborations
Johan has collaborated with notable professionals in his field, including Sven Wingstrand and Edgard Goobar. Their joint efforts have further advanced the innovations in optical communication systems.
Conclusion
Johan Sandell's contributions to the field of optical communication through his patents and collaborations highlight his significant role as an inventor. His work continues to influence advancements in technology and communication systems.