Does anyone have any references or resources about Forward Error Correction(FEC) codes concerned with Free Space Optical (lasercom) networks with on-off keying modulation?

Are there any resources available other than the CCSDS standards ? I am trying to design an Error correction design for FSO communication and I am planning to use LDPC architecture for its implementation. But I wanted to know if there are more resources available regarding this?

FSO links work differently with Error Correction codes compared to normal RF and I want to know which one will be the most suitable for me.