exhibit 10. 23 confidential treatment requested : certain portions of this document have been omitted pursuant to a request for confidential treatment and, where applicable, have been marked with an asterisk ( “ [ * * * * ] ” ) to denote where omissions have been made. the confidential material has been filed separately with the securities and exchange commission. license agreement united states of america luna technologies, inc. nonexclusive license agreement no. dn - 951 license effective date : 12 / 20 / 00 table of contents preamble article i definitions article ii license grant article iii sublicenses article iv term of license article v practical application article vi united states manufacture article vii royalty and payment article viii reports article ix audit rights article x marking article xi use of the nasa name article xii disclaimer of warranties article xiii risk allocation and indemnification article xiv patent validity article xv points of contact article xvi notices article xvii nonassertion article xviii disputes article xix breach article xx termination article xxi assignment - i - article xxii governing law article xxiii independent entities article xxiv effect of partial invalidity article xxv nonwaiver article xxvi entire agreement article xxvii article headings article xxviii counterparts article xxix acceptance - ii - license agreement preamble this license agreement ( “ agreement ” ) is entered into between the national aeronautics and space administration ( nasa ), an agency of the united states, hereinafter referred to as licensor, having its headquarters in washington, d. c., and luna technologies, inc., a corporation of the state of delaware, having its principal place of business at p. o. box 11704, blacksburg, va, 24062, hereinafter referred to as licensee, as of the date of execution of the last party hereto. witnesseth : whereas, under the authority of 35 u. s. c. § 200 et seq., the u. s. department of commerce has issued patent licensing regulations ( 37 cfr § part 404 ) specifying the terms and conditions upon which licenses may be granted for inventions assigned to licensor ; and whereas, licensor is the assignee of u. s. patent application no. 09 / 606, 120 for an invention entitled “ single laser sweep full s - parameter characterization of fiber bragg gratings, ” which was filed on june 15, 2000 ; and