1. Nano Tech Center, Texas Tech University, Lubbock, TX 79409, United States
2. Department of Physics, Erzincan University, 24100, Erzincan, Turkey
3. OEM Group, Inc., 2120 W. Guadalupe Rd., Gilbert, AZ 85233, United States
4. Lightwave Photonics Inc., 2500 University Ave. W., B9, St Paul, MN 55114, United States