Output coupler sales@dmphotonics.com To request a quote for standard or custom output couplers email to sales@dmphotonics.com Sample specs: Description of optical component Output coupler Drawing # -- Part Number /CAT# /Stock code# BK7_OC_D25_T12.7_HR620nm_AR620 Batch# or Lot# BK7_OC_D25_T12.7_HR620nm_AR620 Qty in this delivery 2 pieces I. Material Lot BK7 optical grade BK7#37-OC/23 II. Polishing parameters Specification Actual data Nominal Tolerance Diameter, mm 25 +0.0/-0.1 meets Thickness, mm 12.7 +0.0/-0.1 meets Wedge, deg 1 -- meets Surface accuracy, waves at 633nm 1/10 -- meets Surface quality, scr/dig 20/10 -- meets III. Coating parameters Specification Actual data (measured/ extrapolated) Nominal Tolerance HR coating R= 98% (+0.5/-1%) at 620nm AR coating at 620nm at wedged part Description of optical component Output coupler Drawing # -- Part Number /CAT# /Stock code# BK7_OC_D25_T12.7_HR1.25um_AR1.25 Batch# or Lot# BK7_OC_D25_T12.7_HR1.25um_AR1.25 Qty in this delivery 2 pieces I. Material Lot BK7 optical grade BK7#19-OC/35 II. Polishing parameters Specification Actual data Nominal Tolerance Diameter, mm 25 +0.0/-0.1 meets Thickness, mm 12.7 +0.0/-0.1 meets Wedge, deg 1 -- meets Surface accuracy, waves at 633nm 1/10 -- meets Surface quality, scr/dig 20/10 -- meets III. Coating parameters Specification Actual data (measured/ extrapolated) Nominal Tolerance HR coating R= 99% (+0.5/-1%) at 1.25um AR at 1.25um coating at wedged part http://www.dmphotonics.com/ah_ay/OC%20mirror.htm Starter kit enables easy femtosecond lasing Femtosecond Kit from Del Mar Photonics http://www.dmphotonics.com/fs_TiSapphire/FemtoStart_Ar-pumped.htm The Femtosecond Kit FemtoStart from Del Mar Photonics represents an excellent compromise between time and cost. Containing all necessary optical and mechanical elements together with a thorough instruction, it enables the user to achieve stable femtosecond lasing after a short period of time. FemtoStart kit can be used as introductory system in colleges and universities for undergraduate and graduate training. FemtoStart Kit is an excellent tool for research groups who would like to learn more about opportunities of using femtosecond laser pulses in a variety of applications including physics, chemistry, biochemistry, biology, new material research, semiconductor physics and optical communications, space research and medicine. Basic FemtoStart Kit's configuration correspond to 100, 50 or 20 femtosecond Ti : sapphire lasers. Optional configurations are also possible. FemtoStart kit has several advantages compared to fixed setups; e.g. repetition rates may be varied from 70 to 140 MHz. We recommend 5 W diode pumped solid state (DPSS) laser (Verdi from Coherent or Millenia from Spectra-Physics) as a pumping source, however any Ar-ion laser or diode-pumped solid-state laser with 3 -- 5W output power will do the job. An output coupler (OC) is a partially reflective mirror used in lasers to extract a portion of the laser beam from the optical resonator. Lasers operate by reflecting light between two or more mirrors which have an active laser medium between them. The medium amplifies the light by stimulated emission. For lasing to occur, the gain of the active medium must be larger than the total loss, which includes both unwanted effects such as absorption, and the intentional release of energy through the output coupler. In other words the laser must attain threshold. There are two important properties of the output coupler: Radii of curvature The output coupler may be either flat or curved, depending on the design of the optical cavity. The face of the output coupler facing into the cavity is the side with the applied partially reflective coating. This is the side which partially determines the laser modal properties. If this inner surface is curved then so must be the outer surface. This will stop the OC performing as a lens. The curvature of the outer surface can be designed to give a collimated laser output. This outer surface generally has an anti-reflection coating applied to maximise the output power. Reflectivity Depending on the gain of the medium, the amount of light the OC needs to reflect back can vary widely. Helium-neon lasers require around a 99% reflective mirror to lase, while nitrogen lasers have an extremely high gain (they are "superradiant") and do not require any OC (0% reflective). The reflectivity of any OC will vary with wavelength. A particular mirror may have a tuning range as low as a 10nm or so. For this reason the spectral properties of the OC are important to consider when a laser cavity is being assembled. output coupler transmission optical output coupler output coupler design of unstable cavities znse output coupler output coupler mirror output coupling

• published: 09 Jan 2014
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