Hello lvanya.Realization of HOA in optisystem is very simple.however you need to analyze flat gain curves for c band wavelengths nd l band.here i have attached some paper .check than and you will get to know how HOA can be made in optisystem.
Flat-Gain L-Band Raman-EDFA Hybrid Optical Amplifier for Dense… Have a look at it!
https://www.google.co.in/url?q=http://ieeexplore.ieee.org/iel5/68/6410445/06373695.pdf%3Farnumber%3D6373695&sa=U&ved=0CA4QFjADahUKEwjDlImZ9NTHAhVKoJQKHca0Cio&usg=AFQjCNF9JaIJd8knehGQUG0nz21xw04qiA
Performance Analysis of Hybrid Optical Amplifiers in 120 x 10 Gbps …. Have a look at it!
https://www.google.co.in/url?q=http://www.seekdl.org/nm.php%3Fid%3D4730&sa=U&ved=0CBAQFjAEahUKEwjDlImZ9NTHAhVKoJQKHca0Cio&usg=AFQjCNE1KtoHCt62d5SYfCPRBVczLW_pQQ
Novel Optical Flat-Gain Hybrid Amplifier for Dense … – IEEE Xplore. Have a look at it!
https://www.google.co.in/url?q=http://ieeexplore.ieee.org/iel7/68/6693740/06668882.pdf%3Farnumber%3D6668882&sa=U&ved=0CAgQFjAAahUKEwj84r7x9NTHAhUIupQKHdxwD3s&usg=AFQjCNFZqqt0jMBUyVMulWG0avoEu01gJA
In case you face any problem in implementation,share with us and we will try to corroct you