Combine 1 teaspoon juice, syrup, bourbon, and pepper, stirring with a whisk. Place salmon on a broiler pan coated with cooking spray. Brush syrup mixture evenly over salmon, and sprinkle with salt.
Broil salmon 5 minutes. Remove pan from oven; drizzle 1 teaspoon juice over each fillet. Broil 1 minute or until fish flakes easily when tested with a fork.