lab10 - ECE 415 EXPERIMENT NO. 10 Fiber-Pigtailed...

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4/12/2011 11- 1 ECE 415 EXPERIMENT NO. 10 Fiber-Pigtailed Semiconductor Laser PURPOSE : To construct a fiber resonator and build a continuous-wave laser with semiconductor optical amplifier operating at infrared wavelength 1550nm. Students will practice alignment of dielectric reflectors and fiber collimators for optimizing the resonator and study the light-current curves of the laser. REFERENCES : 1. B. E. A. Saleh and M. C. Teich, Fundamentals of Photonics 2 nd ed., Wiley- Interscience, (1997), Section 17.2, 17.3 2. C. L. Chen, , Irwin, (1996), Section 4.8 3. M. A. Parker, Physics of Optoelectronics, CRC Press, (2005), Sections 2.3, 2.4. 4. R. Paschotta, Encyclopedia of Laser Physics and Technology , Wiley-VCH, (2008) 5. P. W. Milonni, Laser Physics 2 nd ed. , Wiley, (2010) PROCEDURES : IMPORTANT: Before making any type of fiber connections, you must clean the fiber ends with cotton tipped swabs with ethyl alcohol then dry with compressed air. Do NOT reuse cotton swabs. The dial on SOA sets both drive current and temperature. Make sure the temperature setting stays at 25g . Avoid accidentally changing the temperature. 1. Connect either the input or output of the semiconductor optical amplifier (SOA) to the power meter via fiber patch cords. Use mating sleeves to join patch cords with the same type of connectors. Vary the drive current of the SOA from zero to maximum and measure output power due to spontaneous emission versus current. . 2. Characterize a 90/10 fiber coupler with the setup shown in Figure-1. Connect the input of the fiber coupler to either the input or output of the SOA. Set the SOA drive current to 500mA and measure power at both 10% and 90% ends of the coupler. Verify the power split ratio. Then try feeding light into 90% and 10% ends of the fiber coupler respectively and record the power measured at the original input side. What's the ratio of total power transmitted when the coupler is used in a reversed fashion?
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This note was uploaded on 02/12/2012 for the course ECE 415 taught by Professor Lab during the Spring '11 term at Purdue University-West Lafayette.

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lab10 - ECE 415 EXPERIMENT NO. 10 Fiber-Pigtailed...

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