In thisp ap er the d esign o f 8-c ha nnel Dense are produced in rando m fashion i.e. the am p litud e o f w a velength d ivisio n m ultip lex ing (DW DM )cha o tic ea c h p ulse isd if f erentf ro m the o ther p ulse.W hen these sy stem is p resented a t f requenc ies ra nging f ro m c ha1o9t3ic.0p ulses w ith ra nd o m a m p litud es a re p a ssed TH z to 1 93.7 Thz .The cha o tic signalsare genera ted b y thr o ug h EDFA , these va r y la r g ely a f ter their using sem ic o nd uc to r la ser a nd m a them a tic a lly am p lif ica tio n. If the o utp utA o f is EDnoFt f la ttened it m o d eled b y laser ra te equa tio n.The Ga in f la ttening w ill take ex tra b and w id thw hic h isthe d ra w b a c k o f f ilter (GFF)isused w ith Erb ium d o p ed f ib er am p lif ier DW DM co m m unica tio n m o d el.On the o ther hand , if (EDFA )in DW DM co m m unica tio n m o d el f o r lo ng thesim p le d ata p ulsesw hic h are no tcha o tic in nature d ista nc e tra nsm issio n. The o p tim iz a tio n o f Ga in are p assed thro ugh EDFA , theva ria tio n in am p litud e o f f la ttening f ilter is d o ne in cha o tic enviro nm ent to p ulses w ill no t va ry to that ex ta nt a s in c a se o f a c hieve the f la ttened ga in p ro f ile o f EDFA . The p ulses. So , the resp o nse a nd o p tim iz a tio n o f f ilter w sy nchro niz a tio n o f c ha o s a t tra nsm itter a nd rec eibveerd if f iesrent in b o th the ca ses. A ltho ugh, d if f erent ac hieved to rec o ver the rec eived signal. Thus, o ur tec hniquesare b eing used f o r the f la ttening o f gain o f sc hem e c o m b ines tw o a d va nta g es i.e. ef f ic ient EDFA , b ut thisisthe f irst tim e that w e ap p lied Ga in b and w id th utiliz a tio n and sec urity atthe sam e tim e in f la ttening tec hnique using f ilter o n cha o tic p ulsesin DW DM co m m unica tio n m o d el. DW DM enviro nm entw hic h isthe signif ic anc e o f this w o rk. K e y w o r d s - Cha o s, DW DM , Ga in Fla ttening Filter, The id ea o f sy nchro niz a tio n in cha o tic o p tic al Cha o s Sy nc hro niz a tio n, Cha o tic L a sers, EDFA , sec ure co m m unica tio n hasgained huge attentio n in the Op tisy stem 1 4.0 lastf ew y ea rs.Op tica l co m m unica tio n em p lo y ed w ith sy nchro niz ed cha o tic ca rriersca n b e used f o r p ro vid ing I.INTRO DUCTIO N sec urity in d igita l co m m unica tio n sy stem s[v].Chao tic o p tic al co m m unica tio n requiresthe sy nchro niz a tio n o f Secure co m m unica tio n hasb ec o m e an em erging inp utand o utp utcha o sso thato riginal m essage ca n b e need o f the nex t g ener a tio n telec o m m unic a tio n ex tra c ted f ro m cha o tic signal [vi-viii]. A thens and netw o rks.M essa ge isenc ry p ted atthe p hy sica l lay er to Greec e ex p erim ents ha ve f irst d em o nstra ted the p ro vid e sec urity.There are vario usm etho d sto p ro vid e ex p erim enta l im p lem entatio n o f cha o s f o r sec urity sec urity in o p tic al co m m unica tio n netw o rks.Chao tic p urp o ses.Ho w ever, cha o sisa sto cha stic p ro c essand o p tic al c o m m unica tio n is o ne o f the trend ing mhaesthvoerdysunp red ic ta b le b eha vio r and sensitive to initia l to im p ro ve sec urity and p riva c y o f critic a l inf o rm a tio n co nd itio n. The d isp arity in tra nsm itter and rec eiver [i-iv].In o rd er to m eet the m o re b and w id th d em a nd cha o tic signalsca usesp o o r sy nchro niz a tio n and thus cha o tic signalsare em p lo y ed w ith W DM .EDFA isused increa sesB ER results[ix -x i]. to c o m p ensa te f o r lo sses a nd to o b ta in a m p lif ied Cha o s g ener a tio n tec hniques o f f er lim ited signals.A sthe EDFA gain isw a velength d ep end ent, b and w id th so w a velength d ivisio n m ultip lex ing isthe am p lif ica tio n o f w a velengthsvariesf ro m o ne ano ther. ultim a te w a y to m eet the b a nd w id th d em a nd . In o ur w o rk, EDFA ga in is f la ttened using ga in W a veleng th d ivisio n m ultip lex ing a nd d ense f la ttening f ilter so that these ca n b e used to ac hieve w a velength d ivisio n m ultip lex ing tec hnique have b een lo nger d ista nces w hile using w ith the m ultic ha nnel ex tensively used f o r b o th sec urity a nd b a nd w id th tra nsm issio n sy stem .Fo r thisp urp o se, o p tim iz a tio n o f enha nc em ent p urp o ses[x ii, x iii]. DW DM givesthe gain f la ttening f ilter isd o ne to ac hieve f la ttened gain. m ax im um ex p lo itatio n o f ava ila b le b and w id th asthe The w o rk isd o ne f o r the f irsttim e o n DW DM cha o tic cha nnel sp ac ing b etw een cha nnel iskep tnarro w i.e.1 0 0 ca rriersto save theb and w id th in sec ure enviro nm ent. GH z (0 .8 nm ).Erb ium d o p ed f ib er am p lif ier hasb een One o f the p ro p erty o f c ha o tic p ulses is exthteantsivethlyesuesed in w a velength division multiplexing