The way you put two SC connectors on a single fiber is by using a wavelength division multiplexer (WDM) optical coupler on the fiber ends. This device allows access to different wavelengths supported by the fiber. A wavelength on a fiber is similar to having an additional lane of traffic on a highway (each travels only in a single direction at a time). The transciever modules that are installed in your data equipment need to be matched to the wavelengths of your WDM coupler. I've provided a link to an example of a WDM coupler.
WDM Coupler
<http://www.afltele.com/products/fiber_to_the_subscriber/passive_infrastructure/optical_connectivity/optical_components_modules/coupler_modules.asp>
I forgot, Cisco does sell an SFP optics transceiver (for singlemode fiber applications) that has a built WDM coupler. The SFP module has a single fiber input (LC connector) and yet handles both transmit and receive over a single fiber.
Cisco 1000BASE-BX10-D and 1000BASE-BX10-U SFP for Single-Fiber Bidirectional Applications
<http://www.cisco.com/en/US/prod/collateral/modules/ps5455/ps6577/product_data_sheet0900aecd8033f885.html>
What is your application?
Below is a link to a website that you can review to learn some of the basics of fiber optics.
Fiber Optic Association (basic fiber info)
<http://www.thefoa.org/tech/ref/index.html>
Hope this helps!
Tom
