Hi Prakasha,
there are some examples that use oscillators in our example library. go to file , examples and under component sample files/receivers library/regenerators you can find a voltage controlled oscillator example. you can also check for other systems containing oscillators in Advanced modulation systems or maybe Lightwave systems. You can also check out the optisystem manuals to see if there is anything there that might be of use for you https://optiwave.com/resources/applications-resources/lightwave-system-components/. all of the manuals available are displayed at the right of the page.
Best,
Josh