Combine first 4 ingredients and 1/4 teaspoon salt in a small saucepan over high heat, and bring to a boil. Reduce heat, and simmer until reduced to 1/4 cup (about 15 minutes). Set aside.
Preheat oven to 400°.
Heat oil in a large nonstick skillet over medium-high heat. Sprinkle both sides of salmon with remaining 1/4 teaspoon salt and black pepper. Add fish to pan; cook 3 minutes. Turn fish over and place in oven; bake at 400° for 3 minutes. Remove from oven; brush 1 tablespoon sauce over each fillet. Return to oven, and cook 1 minute or until fish flakes easily when tested with a fork or until desired degree of doneness. Sprinkle with orange rind, if desired.