Bitlocker will make you have a hard time when it comes to multiboot and only one drive (RAID 0 behaves like one single drive). The RAID is another possible point of failure.
If you really want to set it up:
Backup all your data
Disable RAID
Reinstall Windows on one SSD (Bitlocker Encryption is fine then)
Install Linux along with its bootloader (grub) on the other SSD (LUKS encryption is also ok here)
Boot from the Linux drive. Grub will then prompt you for the password to the encrypted LUKS partition.
You will not be able to access your Linux drive under Windows and vice versa. At least not with preinstalled tools.